Window Frame Clip Connection with Adhesive Bonding

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Solution Overview

Problem

Existing frame constructions for windows and doors require numerous holders and extensive alignment for secure attachment of metal profiles, leading to high material and installation costs, and are prone to durability issues due to thermal expansion coefficient differences between materials.

Innovation Solution

A clip connection assembly unit comprising an insert and attachment profile, where the insert forms a defined contact surface with a double-sided adhesive, allowing easy alignment and secure bonding without additional fixing measures, and accommodating thermal expansion through recesses and shape design.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If holders are used to fasten the attachment profile to the frame, then secure connection is achieved, but material costs and installation costs increase significantly

Engineering Contradiction:

Improveconnection reliabilityVSAvoidnumber of holders required

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The invention extracts the essential connection function from the complex holder system and implements it through a simplified adhesive-based attachment mechanism. The adhesive layer applied to the inner side of the attachment profile directly bonds to the frame, eliminating the need for multiple mechanical holders while maintaining secure connection reliability.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The invention replaces the mechanical holder system with a chemical bonding mechanism using adhesive. Instead of relying on mechanical fastening elements that require precise alignment and multiple components, the adhesive layer provides a continuous bonding surface that simplifies the connection system while ensuring reliable attachment between the metal attachment profile and the wooden or plastic frame.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Manufacturing precision

If extensive alignment work is performed to ensure perfect connection, then connection precision is improved, but assembly time and labor costs increase

Engineering Contradiction:

Improvealignment precisionVSAvoidassembly time

Core Design Contradiction:

Manufacturing precisionVSLoss of time

Solution Approach 1:

The adhesive layer is pre-applied to the inner side of the attachment profile before installation, creating a ready-to-bond surface that eliminates the need for precise alignment during assembly. The adhesive provides tolerance for positioning variations, allowing the attachment profile to be quickly attached to the frame without extensive measurement and adjustment work.

Inventive Principle:

Principle #10Preliminary action

3Reliability

If traditional fastening methods are used, then secure attachment is achieved, but durability problems arise due to thermal expansion coefficient differences

Engineering Contradiction:

Improveattachment securityVSAvoidbond durability

Core Design Contradiction:

ReliabilityVSDuration of action of stationary object

Solution Approach 1:

The invention changes the bonding mechanism from rigid mechanical fastening to flexible adhesive bonding. The adhesive layer accommodates differences in thermal expansion coefficients between the metal attachment profile and the wooden or plastic frame by providing a compliant bonding interface that can absorb dimensional changes without compromising the durability of the attachment.

Inventive Principle:

Principle #35Parameter changes

4Strength

If multiple holders are installed to secure the attachment profile, then connection strength is improved, but material costs increase

Engineering Contradiction:

Improveconnection strengthVSAvoidmaterial quantity

Core Design Contradiction:

StrengthVSQuantity of substance

Solution Approach 1:

The invention merges the functions of multiple holders into a single continuous adhesive layer that spans the attachment interface. Instead of using several discrete fastening elements distributed along the attachment profile, the adhesive layer provides uniform bonding across the entire contact surface, achieving equivalent or superior connection strength while using less material and simplifying the overall construction.

Inventive Principle:

Principle #5Merging (Combining)

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 reduces material and assembly costs, ensures reliable and durable attachment, and simplifies handling by eliminating the need for extensive alignment and additional fixing, while minimizing the impact of thermal expansion on the bond.

Implementation Method 1

The insert forms a defined contact surface for the bond between the attachment profile and the frame

Methodology Applied

Scientific EffectAdhesive bonding: Adhesive

Data Source

PatentEP1980702B1Frame construction for windows and/or doors

Publication Date: 2011.12.21 GUTMANN AG

Figure 1
Figure 2
Figure 3(A)~3(B)

AI summary

The frame construction for fixed (3) or opening (2) windows comprises an exterior profile (4, 5) which clips on to the sides (10) of inserts (6) attached to the frame and is fixed to them with adhesive (7).