The glass assembly of ultra-narrow aluminum alloy swing doors must balance structural stability and reliable sealing. This is achieved through precise material matching, standardized processes, and meticulous attention to detail to construct a multi-layered protection system. The compatibility between the glass and the profile is fundamental. Due to the limited width of the profile, ultra-narrow aluminum alloy swing doors require glass with a height that matches the groove dimensions. This avoids insufficient compression of the sealing strip due to excessive gaps, or rigid contact between the glass and the profile due to insufficient gaps. Simultaneously, the glass thickness must match the load-bearing capacity of the profile design. Excessive thickness may increase the risk of profile deformation, while insufficient thickness reduces wind pressure resistance; a reasonable range must be determined through calculation.
The selection and installation process of the sealing strip directly affect the waterproofing effect. The sealing strip for ultra-narrow aluminum alloy swing doors must possess high elasticity, aging resistance, and weather resistance. It is typically made of EPDM rubber or silicone rubber, and its cross-sectional design must perfectly fit the profile groove to ensure uniform compression. During installation, the sealing strips should be continuous and unbroken. Corners should be joined at a 45-degree angle or treated with a special adhesive to prevent leaks due to gaps. For ultra-narrow door frames, composite sealing strips or multi-cavity structures can be used to enhance waterproofing by adding multiple sealing layers. For example, a water-retaining strip can be added to the outside of the main sealing strip to create a double barrier.
The glass fixing method must balance strength and flexibility. Ultra-narrow aluminum alloy swing doors typically use either pressure strip fixing or structural adhesive bonding. Pressure strip fixing requires precise clearance between the strip and the frame, using mechanical clips or screws to prevent loosening. The strip surface must be flat and free of deformation to avoid stress concentration caused by pressure on the glass. For structural adhesive bonding, high-strength, weather-resistant silicone structural adhesive should be used. Before bonding, the contact surfaces of the glass and frame must be cleaned to remove oil, dust, and oxide layers to ensure bonding strength. The adhesive layer thickness must be uniform, usually controlled within the specified range. Too thick a layer can cause air bubbles, while too thin a layer reduces bonding reliability.
Drainage system design is crucial for preventing leaks. The profile cavity of ultra-narrow aluminum alloy swing doors requires a well-designed drainage path, typically with drainage holes at the bottom of the door frame, positioned at the lowest point to prevent water accumulation. These drainage holes must be equipped with backflow prevention devices, such as a "concealed drainage channel + windproof cover" structure, to prevent rainwater from flowing back under wind pressure. Simultaneously, air pressure balancing holes should be installed inside the profile to balance the internal and external air pressure differences, reducing the force required to force rainwater into the room. The processing precision of the drainage holes must be strictly controlled; the hole diameter must meet design requirements, and the edges must be free of burrs to avoid scratching the sealing strip or causing drainage problems.
The gap between the glass and the profile requires meticulous attention. The gap between the glass and the profile in ultra-narrow aluminum alloy swing doors is usually small, requiring sealing by injecting sealant or filling with expanding foam. When injecting sealant, a dedicated caulking gun should be used, moving at a constant speed to ensure a full, continuous sealant joint without air bubbles or gaps. The width of the sealant joint must be determined according to design requirements. Too wide a joint can cause the sealant to crack, while too narrow a joint will reduce the sealing effect. When filling with expanding foam, the amount applied must be controlled to avoid excessive application that could deform the profile. After application, the surface must be smoothed with a special tool to ensure it is flush with the profile.
The installation quality of the hardware indirectly affects the stability of the glass assembly. Hinges, locking systems, and other hardware in ultra-narrow aluminum alloy swing doors must be securely installed to ensure a tight fit between the door and frame when closed, preventing leaks due to insufficient closure. The fixing screws for the hardware must be of the same specifications as the profile, and tightened with moderate force to prevent the door from sagging or deforming due to loosening. Simultaneously, the surface treatment of the hardware must be corrosion-resistant to prevent rust contamination of the glass or profile after long-term use.
Post-installation inspection and maintenance are essential for long-term protection. After the glass assembly is completed, a comprehensive inspection must be conducted, including the continuity of the sealant joint, the unobstructed drainage holes, and the tightness of the hardware. Any problems found should be repaired promptly. During use, the surfaces of the glass and profiles should be cleaned regularly to prevent the accumulation of dust, sand, and other impurities that could scratch the sealing strips or the glass. At the same time, the aging condition of the sealing strips should be checked, and any cracked or deformed strips should be replaced promptly to ensure long-lasting and effective sealing performance.
