L-Shaped Wooden Cladding Profile for Large Aluminium Window Frames

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Solution Overview

Problem

Existing large aluminium frames, particularly in minimalist casement systems, face challenges in achieving seamless wooden cladding without altering the original design, ensuring robust adhesion, and maintaining material continuity while allowing for increased dimensions and stability.

Innovation Solution

A wooden cladding profile with perpendicular flat faces and cavities filled by an MS polymer adhesive ensures effective adhesion to aluminium frames, maintaining a minimalist aesthetic and continuous material visibility, even in large dimensions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If wooden cladding is applied to large aluminium frames to achieve seamless material continuity, then material continuity and aesthetic quality are improved, but the frame design complexity and adhesion reliability deteriorate

Engineering Contradiction:
Improvematerial continuityVSAvoidadhesion reliability
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The wooden cladding profile is segmented into multiple flat faces (first flat face, second flat face) that can be applied to different surfaces of the aluminium frame. This segmentation allows the cladding to conform to the frame geometry while maintaining material continuity, and the separate faces can be independently adhered to ensure reliable bonding on each surface.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

An adhesive layer is introduced as an intermediary between the wooden cladding profile and the aluminium frame. This adhesive mediator ensures reliable adhesion while allowing the wooden cladding to maintain its aesthetic function of providing seamless material continuity across the frame surfaces.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Ease of operation

If cladding thickness is reduced to maintain minimalist aesthetic, then aesthetic quality is improved, but structural strength and stability deteriorate

Engineering Contradiction:
Improveaesthetic qualityVSAvoidstructural strength
Core Design Contradiction:
Ease of operationVSStrength

Solution Approach 1:

The wooden cladding profile has different thickness characteristics in different regions. The profile is designed with specific thickness dimensions (e.g., 3-4mm) that are sufficient for structural strength while maintaining the minimalist aesthetic. The perpendicular flat faces are optimized to provide adequate material thickness for strength while preserving the thin, clean appearance desired for minimalist design.

Inventive Principle:
Principle #3Local quality

3Adaptability or versatility

If frame dimensions are increased to allow larger openings, then functional versatility is improved, but adhesion effectiveness and stability deteriorate

Engineering Contradiction:
Improvefunctional versatilityVSAvoidadhesion effectiveness
Core Design Contradiction:
Adaptability or versatilityVSReliability

Solution Approach 1:

The cladding profile is divided into multiple flat faces that can be independently adhered to the aluminium frame. This segmentation distributes the adhesion requirements across multiple bonding surfaces, improving overall adhesion effectiveness for larger frame dimensions while maintaining the ability to accommodate various opening sizes and configurations.

Inventive Principle:
Principle #1Segmentation

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 stable, non-toxic, and durable wooden cladding that adheres securely to aluminium frames without altering the frame's design, ensuring seamless material continuity and increased dimensions up to 1300x3000mm, promoting the use of lighter materials.

Implementation Method 1

The adhesive element (3) is made from a polymer consisting of a single polyether chain and methoxysilyl chain ends, and is the base resin for the production of quality sealants and adhesives for construction applications... thus guaranteeing its adhesion to aluminium

Methodology Applied
Scientific EffectAdhesion: Adhesive

Data Source

PatentEP4653655A1Profile for wooden cladding for large windows and respective frames
Publication Date: 2025.11.26 BBG SA
  • EP4653655A1 patent drawingFigure 1~2
  • EP4653655A1 patent drawingFigure 3~4
  • EP4653655A1 patent drawingFigure 5

AI summary

The present invention concerns a profile (1) for wooden coverings to be applied to large aluminum frames, said large aluminum frames comprise fixed frames (5) in buildings (8), and sashes (6) with perimeter frames (7). The present invention covers the perimeter frames (7) of the sashes (6), and/or the fixed frames (5), as it comprises two flat faces (4a)(4b) perpendicular to each other, in the shape of an "L", each of the flat faces (4a)(4b) comprising a longitudinal cavity (2) along its entire length to be filled by an adherent element. The profile (1) is made of modified wood, increasing its stability for application in frames.