Sealing Strip With Hinge Areas And Tension Web
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Solution Overview
Problem
Existing window, door, and facade seals face challenges in maintaining an effective seal under dynamic loads, particularly due to oblique movements, resulting in inadequate sealing and high operational forces.
Innovation Solution
A sealing profile with a hose area featuring three joint areas and a tension web, allowing for optimized sealing by pulling the sealing lip towards the hose area, which is designed to rest on an abutment opposite the foot area, providing a tensile effect and improved sealing without excessive counterforces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a tube-like sealing body is used to handle oblique dynamic loads, then the seal can withstand pivoting movements, but the actuation forces become very low resulting in insufficient sealing under wind forces or gap tolerances
Solution Approach 1:
The sealing body is divided into functional segments: a hose section for flexibility, a pressure rib for force generation, and a sealing rib for contact. This segmentation allows each part to perform its specific function optimally, resolving the contradiction between flexibility for dynamic loads and force generation for sealing.
Solution Approach 2:
The hose section is designed with hinge areas that allow dynamic kinking and deformation under load, enabling the seal to adapt to oblique movements and pivoting actions while maintaining sealing contact. This dynamic capability allows the seal to withstand dynamic loads without requiring excessive actuation forces.
2Reliability
If the geometry of the seal is increased to improve sealing under dynamic loads, then sealing performance improves, but considerable operating forces are generated which is also a disadvantage
Solution Approach 1:
The seal geometry is optimized with specific parameters: the hose section has a defined kinking capability, the pressure rib has a specific angle and dimension relative to the sealing rib, and the sealing rib has optimized contact geometry. These parameter changes enable effective sealing under dynamic loads while controlling operating forces to acceptable levels.
3Reliability
If contact seals are used in the rebate area, then sealing is provided, but they are subjected to various dynamic loads including oblique loads from pivoting movements requiring rounded shapes which reduce actuation forces
Solution Approach 1:
The hose section incorporates curved surfaces and rounded geometries that allow it to deform and kink under oblique loads from pivoting movements. This curvature enables the seal to accommodate dynamic loading directions while maintaining sufficient actuation forces through the pressure rib mechanism.
Solution Approach 2:
The seal combines different material properties in one component: the hose section uses flexible material for deformation, the pressure rib uses stiffer material for force generation, and the sealing rib uses material optimized for contact sealing. This composite structure resolves the contradiction between handling oblique loads and maintaining actuation forces.
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
The sealing profile achieves a high sealing effect with reduced operational forces, effectively sealing gaps under dynamic loads and varying pressures, enhancing the sealing performance without increasing installation forces.
Implementation Method 1
the hose area pulls the sealing lip towards itself in the gap, i.e. in the compressed state
Data Source
Figure 1
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AI summary
A sealing profile for sealing a gap to be sealed between two elements of a window, door or facade, in particular for sealing a gap between two elements of the window, door or facade that are movable relative to each other, comprising a base area (21) and a bottom wall (24), comprising a sealing body (19) formed on the side of the bottom wall (24) facing away from the base area (21), which is designed as a tube area (22) having a chamber (33), and comprising a sealing web (23) laterally to the tube area (22), is characterized in that a section with at least two hinge areas (26, 27) is formed in the tube area (22) on the side facing the sealing web (23), which allow a limited folding of the tube area (22) on this side in the gap to be sealed, and that a tension web (31) is formed between the sealing lip (23) and the section with the hinge areas (26, 27). is,which, when the hose area is compressed in the gap (S) to be sealed, pulls the sealing lip (23) towards the hose area (22).