Window Joinery Bonding Piece for Frame Rigidity
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Solution Overview
Problem
Conventional fixing methods for double-glazed window frames, particularly those with long glazed panels or mixed materials like aluminum and PVC, face issues with maintaining desired tightening tension and rigidity due to the elasticity of pinched joints, leading to suboptimal sealing and adhesion.
Innovation Solution
Incorporating a bonding piece within the frame's uprights to create a closed chamber for additional mastic, enhancing the connection between the glazed part and the frame, which improves rigidity and allows for different stiffness profiles without modifying existing profiles, and using a foamed plastic or polyamide material for the bonding piece.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a conventional pinched joint fixing method is used, then the structure remains simple and easy to manufacture, but the tightening tension and rigidity are insufficient for long glazed panels or mixed-material frames
Solution Approach 1:
The bonding piece is inserted inside the upright profile, creating a nested structure where the bonding piece fits within the profile's internal cavity. This allows the bonding piece to reinforce the fixing without adding external complexity, as it is housed within the existing profile structure.
Solution Approach 2:
The bonding piece acts as an intermediary element between the glazed part and the frame profile. It provides an additional bonding interface and reinforces the connection, mediating the force transmission between the glazing and the frame structure.
2Reliability
If additional bonding mastic is introduced to improve sealing and adhesion, then the connection strength increases, but the risk of mastic leakage and contamination increases
Solution Approach 1:
The bonding piece creates a nested configuration where the bonding mastic is contained within the cavity formed by the bonding piece and the profile. This nested structure prevents mastic from escaping to the exterior, containing it within the internal bonding zone.
Solution Approach 2:
The bonding function is extracted from the external joint interface and relocated to an internal bonding chamber. By moving the bonding action inside the profile structure, the mastic is applied where it cannot leak outward, separating the bonding function from the external sealing interface.
3Stability of the object's composition
If the frame structure is modified to accommodate additional bonding mechanisms, then the rigidity improves, but the manufacturing complexity and profile modification requirements increase
Solution Approach 1:
The bonding piece serves multiple functions: it reinforces the fixing, provides an additional bonding surface, contains the mastic, and maintains the profile's external dimensions. This multi-functionality allows rigidity improvement without requiring specialized profile modifications for each function.
Solution Approach 2:
The bonding piece is a simple, inexpensive insert that can be easily manufactured and installed. Rather than modifying the expensive and complex profile structure, a simpler bonding piece is used to achieve the rigidity enhancement, reducing manufacturing complexity.
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 enhances the rigidity of the sliding carpentry, maintains aesthetic integrity, and ensures a secure seal by using additional mastic within the bonding chamber, addressing the limitations of conventional pinched joint methods.
Implementation Method 1
a bonding mastic which creates, between the glazing and the profile, a closed chamber into which is introduced a bonding mastic
Implementation Method 2
said bonding piece is made of a foamed plastic material or a plastic material, for example of the polyamide type
Data Source
Figure 1
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Figure 3~5
AI summary
The device (D) has a U-shaped joint (300) associated interiorly with edges of a pair of glass panels (210, 220) and externally associated with edges of a U-shaped recess (130). A plastic joining piece (400), on a portion of height of posts formed by a frame (100), is inserted between one of the edges of the panels and one of profiles (110, 120) of the frame. The piece forms a closed chamber, in which a joining sealant is introduced, between a glazing pane (200) and the other profile of the frame.