Glass Fiber-Reinforced Polyamide Window Profile
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Solution Overview
Problem
Current window profiles face limitations in thermal performance and mechanical strength, with materials like aluminum and PVC experiencing thermal conductivity issues and deformation due to temperature differences, and polypropylene profiles being difficult to assemble and prone to volume instabilities during extrusion.
Innovation Solution
A hollow polyamide sash profile filled with glass fibers, designed with central and connecting cavities, side cells, and specific fastening and assembly features, which allows for improved thermal performance, mechanical strength, and ease of assembly, while avoiding the bimetallic effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If aluminum profiles are used, then mechanical strength is improved, but thermal performance deteriorates due to high thermal conductivity
Solution Approach 1:
The patent employs a composite structure combining aluminum profile with polyamide insulation elements. The aluminum provides the necessary mechanical strength and structural framework, while the polyamide material inserted within the profile's cavities acts as a thermal break to reduce heat conduction. This composite approach allows simultaneous achievement of high mechanical strength and improved thermal performance.
2Loss of energy
If PVC profiles are used, then thermal performance is improved, but mechanical strength deteriorates
Solution Approach 1:
The patent uses a composite system where PVC or polyamide insulation elements are integrated within an aluminum profile structure. The polyamide material (with Uf coefficient between 0.8 and 1.8 W/m2.K) provides excellent thermal insulation properties, while the aluminum outer structure maintains the necessary mechanical strength and structural integrity.
3Ease of manufacture
If polypropylene profiles are used, then ease of manufacture is improved, but assembly difficulty increases and volumetric stability deteriorates
Solution Approach 1:
The patent combines polypropylene extruded profile with polyamide insulation elements. The polypropylene provides ease of manufacture through extrusion processes and good volumetric stability, while the integrated polyamide components facilitate assembly through their specific mechanical properties and connection designs.
4Strength
If metal reinforcements are added to PVC profiles, then mechanical strength is improved, but device complexity increases
Solution Approach 1:
The patent uses a composite structure where polyamide material serves as both the structural profile and the insulation element, eliminating the need for separate metal reinforcements. The polyamide's inherent mechanical properties provide sufficient strength while maintaining a simpler single-material construction approach compared to reinforced PVC profiles.
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 solution provides a window profile with enhanced thermal performance, mechanical resistance, and simplified assembly, maintaining stability and reducing thermal bending issues, making it suitable for large-scale production and easy installation.
Implementation Method 1
The present invention relates to a hollow profile for the construction of a sash, particularly a sliding sash, for a glazed opening... made of glass fiber-reinforced polyamide material
Implementation Method 2
The compartments thus formed (also called alveoli or insulation chambers) contain almost stationary air which limits any potential heat loss by convection
Data Source
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AI summary
The invention relates to a hollow profile (100) for the construction of an opening frame (200), in particular sliding, of a glazed opening.Furthermore, said hollow profile is made of glass fiber-reinforced polyamide material and comprises: - two cavities, respectively referred to as central (110) and connecting (120), each of said cavities having a first wall (111, 121) intended to extend in a mean plane normal to the glazed opening, a second wall (112, 122) opposite said first wall (111, 121), as well as lateral walls (113, 114, 123, 124) connecting said first (111, 121) and second (112, 122) walls, - lateral cavities (130, 140, 150, 160) arranged on either side of said central (110) and connecting (120) cavities, - fastening means (190) intended to maintain the profile in a stable and reversible position a glazing bead profile (230) of the opening frame (200), - assembly means intended to maintain in a stable and reversible position protective profiles (281, 282) of the opening frame (200).