Aluminum alloy casement window assembly process analysis--①

In the aluminum alloy doors and windows industry, the assembly process is one of the core technologies that determine product performance, stability and service life. Among them, ordinary corner code assembly and expansion type glue injection corner code assembly are two mainstream technology. In this paper, we will analyze the difference between the two from the process principle, performance differences and practical application scenarios, and show the core concept of YOOAN doors and windows brand to create high-quality doors and windows with craftsmanship.

I. Ordinary corner code assembly process: tradition and limitations

Ordinary corner code assembly is one of the basic processes in the aluminum alloy doors and windows industry, the core of which is to achieve the splicing of window frames through mechanical connections.

Simple structure: L-type or T-type metal corner code (mostly made of aluminum alloy or stainless steel) is used and fixed directly into the profile cavity by screws or rivets.

High dependence on labor: the installation position and fastening strength of the corner code depend on the experience of workers, which is easy to cause insufficient splicing precision due to operational deviation.

Limited sealing: the angle code and the profile only rely on physical fixing, not filled with sealing materials, easy to form micro-gaps, long-term use may be water seepage, air leakage problems.

Weak deformation resistance: ordinary corner code only provides the basic connection, can not completely offset the deformation stress of the profile due to temperature differences or external forces, which may lead to cracking or loosening of the window corner.

II.expansion type glue injection corner code assembly process: innovation and breakthroughs

Expansion type glue injection corner code is an advanced process combining mechanical connection and chemical bonding, which represents the direction of high-end technology in modern window and door manufacturing.

Process characteristics:

Double reinforcement design: 

Expansion corner code structure: the corner code has a built-in expansion slot, after impacting by special equipment, the corner code expands in the profile cavity to form a tight mechanical bite.

Gum injection and sealing technology: After the expansion of the corner code, a high-strength sealant (e.g. polyurethane adhesive) is injected into the splicing cavity, and the gel fills all the gaps and cures, realizing the integration of structural bonding and sealing.

Double improvement of precision and strength: 

The precise positioning system of the expanded corner code ensures that the error of the splicing angle is less than 0.5°, which greatly improves the squareness of the window frame; 

After the curing of the injected adhesive, the shear strength of the corners is increased by more than 3 times, which can withstand the extreme temperature difference and the test of strong wind pressure.

Long-lasting sealing protection: the sealant completely isolates water vapor penetration, avoiding oxidation and corrosion of metal contact surfaces, prolonging the service life of windows and doors.

The difference between ordinary corner code and expanding rubberized corner code is essentially a watershed between “basic function” and “ultimate performance”. YOOAN firmly believes that only with expanding corner code technology as the cornerstone, can we truly realize the quality promise of windows and doors. In the future, we will continue to build a safe, silent and energy-saving quality living space for global users with our craftsmanship and intelligence, so that every window will become a classic work worthy of inheritance.