In the construction industry, the strength and stability of doors and windows are crucial, not only to the safety of the building, but also to its service life. Aluminum-plastic co-extruded profiles with aluminum alloy skeleton and dovetail groove structural design, while enhancing the rigidity and strength of profiles, realize the efficient use of materials, and greatly safeguard the wind pressure and deformation resistance of windows and doors, building a solid foundation for the long-term stable use of windows and doors.

Aluminum alloy skeleton: provide basic support

Aluminum-plastic co-extruded profile selects 6063-T5 aluminum alloy as the skeleton, the yield strength of this aluminum alloy can reach more than 200MPa and the tensile strength is more than 260MPa, which has the characteristics of low density and high strength. In the installation and daily use of windows and doors, aluminum alloy skeleton as the main load-bearing structure, can effectively resist a variety of external forces, to ensure that the doors and windows will not be easily deformed, for the overall strength of the profile has laid a solid foundation. Taking high-rise residential buildings as an example, doors and windows need to withstand large wind loads, and the aluminum alloy skeleton, by virtue of its high strength, can effectively reduce the risk of damage to doors and windows due to wind.

Dovetail groove structure: innovation to enhance rigidity

The design of dovetail groove structure is the key to enhance the rigidity and strength of aluminum-plastic co-extruded profiles. The unique shape of the dovetail groove makes the aluminum alloy skeleton and the plastic outer layer closely bite, when the doors and windows are subjected to external forces, this structure allows the aluminum alloy and plastic to work together to avoid the situation of aluminum alloy and plastic detachment. Through finite element analysis and actual testing shows that compared with the ordinary structure, the overall rigidity of aluminum-plastic co-extruded profiles with dovetail groove structure is improved by about 35%. In terms of wind pressure resistance, according to GB/T 7106-2019 “Grading and Testing Methods for Airtightness, Watertightness and Wind Pressure Resistance of External Doors and Windows of Buildings”, the wind pressure resistance of aluminum-plastic co-extruded windows and doors can reach grade 9, and can withstand wind pressure of more than 5.0kPa, which is much higher than the standard for ordinary windows and doors and effectively reduces the risk of damage to the windows and doors in a strong wind environment.

Moment of inertia data highlights structural advantages

Moment of inertia is an important index to measure the bending resistance of the profile, the larger the moment of inertia, the stronger the bending resistance of the profile. Through the optimization of structural design, aluminum-plastic co-extruded profiles have significantly increased the moment of inertia under the premise of ensuring the overall size. The moment of inertia of ordinary aluminum alloy door and window profiles is difficult to meet the requirements of high strength under certain working conditions, while aluminum-plastic co-extruded profiles with multi-cavity profile design and dovetail groove structure, the moment of inertia has been significantly improved. In the simulation of strong wind and other complex stress environment, aluminum-plastic co-extruded profiles can disperse the force uniformly and reduce the local stress concentration, which greatly enhances the profile's resistance to bending and twisting, and further protects the wind pressure and deformation resistance of windows and doors.

Material saving and long-term stability

While ensuring strength, aluminum-plastic co-extruded profiles achieve effective material saving through the synergy of aluminum alloy skeleton and dovetail groove structure. Compared with traditional aluminum alloy doors and windows, aluminum-plastic co-extruded doors and windows can save about 25% of aluminum alloy materials while ensuring the same strength. This not only reduces production costs, but also reduces resource consumption. In addition, the solid structural design greatly improves the long-term stability of doors and windows. In long-term use, even through temperature changes, humidity fluctuations and various external forces, aluminum-plastic co-extruded windows and doors can maintain good performance by virtue of their stable structure, reducing the cost of repair and replacement due to deformation and damage, and extending the service life of windows and doors.

Practical application verification

In a commercial building project in the coastal area, the building uses aluminum-plastic co-extruded doors and windows. In many typhoons, the doors and windows withstood the test of strong winds without deformation or damage, effectively protecting the safety of indoor personnel and property. As the aluminum-plastic co-extruded windows and doors realized material saving, the project reduced the construction cost under the premise of quality assurance, and gained high recognition from the owner.

Conclusion

Aluminum-plastic co-extruded profiles greatly improve the rigidity and strength of the profiles through the synergy of aluminum alloy skeleton and dovetail groove structural design, which realizes reasonable material savings while ensuring the wind pressure and deformation resistance of windows and doors, and provides a reliable guarantee for the long-term and stable use of windows and doors. With the continuous improvement of the construction industry's performance requirements for windows and doors, aluminum-plastic co-extruded profiles will play a more important role in the construction field by virtue of its unique advantages.