L-Shaped Façade Corner Bracket with Butyl Sealing
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Solution Overview
Problem
Existing corner brackets for insulating glass panes in facade profiles fail to ensure gas-tightness at corners, requiring complex sealing measures and not meeting the EN 1279 standard, while also being difficult to assemble.
Innovation Solution
The corner bracket features recesses on its outer surface filled with butyl, which is sealed by a cover cap, and additional butyl application on side surfaces for enhanced sealing, along with lamellae and flaps to secure the connection between hollow profile strips and corner brackets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional corner brackets are used for connecting hollow profile strips, then assembly is simple, but gas-tightness at corners is not achieved and complex individual sealing measures are required
Solution Approach 1:
The sealing function is merged into the corner bracket itself by integrating recesses filled with butyl directly into the bracket structure. The cover cap is also integrated to seal the butyl, creating a unified sealing system that eliminates the need for separate complex sealing measures while ensuring gas-tightness at corner joints
Solution Approach 2:
Butyl is used as an intermediary sealing material that is pre-positioned in recesses of the corner bracket. When the hollow profile strips are assembled, the butyl is compressed and extruded to seal the joint between the profile strips and the corner bracket, providing reliable gas-tightness without complex sealing mechanisms
2Ease of operation
If butyl is applied at factory during corner bracket manufacture, then assembly is simplified and time-consuming introduction of butyl is eliminated, but butyl may stick together during transport
Solution Approach 1:
The butyl is pre-applied to the corner bracket recesses during factory manufacture before assembly, eliminating the need for time-consuming on-site butyl introduction. This preliminary preparation simplifies the assembly process while maintaining sealing effectiveness
Solution Approach 2:
A protective layer is introduced as an intermediary between the butyl and the external environment during transport. This protective layer prevents the butyl from sticking to itself or other surfaces while allowing the butyl to perform its sealing function when the protective layer is removed during assembly
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 provides reliable gas-tight sealing and simplifies assembly by ensuring butyl penetrates and seals the corner connections, meeting the EN 1279 standard and facilitating easy manufacturing and installation.
Implementation Method 1
butyl can penetrate through the gaps exits the edges of the cover cap and seals the corner between the hollow profile strips and the corner bracket
Implementation Method 2
a cover cap is pressed over these recesses and fastened in the hollow profile strips, so that butyl can penetrate through the gaps exits the edges of the cover cap
Implementation Method 3
the outer surfaces are provided with ribs or the like, so that a good press fit in the hollow profile strips is ensured and these do not pull apart over the connector in the event of thermal length changes
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
A the glass panels forming a double-glazed window are separated by longitudinal profiles that are linked at their corners by L-shaped fittings. The L-shaped fitting has an inner section in contact with the glazing, and is competed by a covering snap-fit cap. The outer face of the inner L-shaped fitting has a detent (4) that is packed with a butyl agent. The snap-fir cap forces surplus butyl through all voids and cracks to expel all air and seal the interface between the longitudinal profiles and the L-shaped fitting.