Vehicle Slider Window Co-Extruded Seal Vibration Damping
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Solution Overview
Problem
Conventional slider window assemblies for vehicles, particularly pickup trucks, lack effective dampening and vibration reduction due to the absence of advanced sealing mechanisms, leading to a less-than-optimal user experience and increased noise levels.
Innovation Solution
The implementation of a co-extruded plastic or rubber seal with a flexible lip and cushioning lip, made from materials like EPDM or TPE, is integrated into the upper rail of the slider window assembly, providing enhanced dampening and cushioning as the movable window panel slides along the rails.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional sealing mechanisms are used in slider window assemblies, then the structure remains simple and manufacturing is easy, but vibration and noise reduction are insufficient
Solution Approach 1:
The seal is constructed as a composite structure with a hard filler material (such as polyvinyl chloride) forming the main body, and a softer elastomeric material (such as EPDM or TPE) co-extruded to form the sealing lip and cushioning portions. This composite material approach allows the seal to provide both structural support and effective vibration dampening, resolving the contradiction between simple structure and vibration reduction performance.
Solution Approach 2:
The seal incorporates regions of different material properties within a single component: the hard filler provides structural integrity and shape maintenance, while the softer elastomeric portions provide compliance, sealing, and vibration absorption. This local differentiation of material quality enables the seal to address multiple functional requirements simultaneously without increasing overall device complexity.
2Object-affected harmful factors
If a co-extruded seal with cushioning lip is implemented, then vibration dampening is improved, but manufacturing process complexity increases
Solution Approach 1:
The seal is manufactured as a single co-extruded component that integrates the filler material and elastomeric material in one continuous manufacturing process. This merging of multiple materials into a single component eliminates the need for separate assembly steps, bonding operations, or alignment procedures, thereby maintaining ease of manufacture while achieving superior vibration dampening through the multi-material construction.
3Object-affected harmful factors
If the seal uses softer elastomeric material for cushioning, then vibration absorption is enhanced, but structural integrity of the rail may be compromised
Solution Approach 1:
The composite seal structure places the hard filler material in the load-bearing portions of the seal that interface with the rail structure, maintaining structural integrity. The softer elastomeric material is positioned in the sealing lip and cushioning regions where vibration absorption is needed. This strategic distribution of material properties within the composite structure allows simultaneous achievement of structural strength and vibration damping without compromising either requirement.
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 solution effectively reduces vibration and noise, enhancing the operational smoothness and user experience by compressing and flexing to absorb movement, while maintaining structural integrity and ensuring proper sealing.
Implementation Method 1
The co-extruded lip or lips may comprise a softer material (such as a thermoset elastomer or rubber material, such as an Ethylene-Propylene-Diene-Monomer (EPDM) or a thermoplastic elastomer (TPE) or the like) to provide the desired dampening feature
Implementation Method 2
The seal comprises an extruded plastic or rubber seal with a sealing lip and/or a cushioning or dampening lip co-extruded with the seal body
Data Source
AI summary
A slider window assembly for a vehicle includes at least one fixed window panel and a movable window panel that is movable along an upper rail and a lower rail at the at least one fixed window panel between a closed position and an opened position. The upper rail includes a channel, and a filler is disposed in the channel of the upper rail. The filler includes a filler body having opposite side walls, and the filler includes lips established along respective ones of the side walls. The lips are extruded onto and along the filler body. The lips include a compressible and flexible material and provide a dampening and cushioning function at the movable window panel when the movable window panel is disposed in the channel of the upper rail.