Comprehensive interpretation of the corners of aluminum doors and windows and sealing the structure to strengthen

After curing epoxy adhesive inelastic, unable to adapt to the form of microseismic, easy crisp and broken, Corner after long-term strength is not enough, will produce cracking, dregs phenomenon. Colloidal slightly foaming during the curing process, expanded, forming metal to metal between the elastic pad, the effective transmission of forces weaken, play a shock, the cushion effect.
With the development of China's construction industry in recent years, aluminum windows and doors have also been developing rapidly. In the rapid development of aluminum windows and doors, while its quality problems are also increasingly prominent. The main questions focused on the quality of their profiles, heat insulation, metal parts and corners of doors and windows and seal strength. Today, we focused on those who use angle code attached to strengthen the corners of aluminum windows and doors often encountered problems with sealing talk about the view.
There are still a lot of people mistakenly believe that: as long as the production of aluminum windows and doors cutting high precision cutting equipment, angle code with the appropriate plus a fixed angle Corner unit, you can make the corners of aluminum windows and doors to achieve the strength and tightness requirements. In fact, most of the use of aluminum windows and doors connecting angle code is to use this process produced. This simple mechanical fixing of the connection is a rigid connection, it is difficult to adapt to windows in the production, transportation, installation, and long-term use encountered by force without being damaged.
First of all, we need to understand the physical properties of aluminum profiles.
Aluminum profiles and other materials, security seals like the existence of any thermal stress. Thermal stress refers to a material change in the temperature-induced stress, typically linear expansion / contraction coefficient.
We can calculate the aluminum alloy in the temperature range of the normal size change, that the linear expansion / shrinkage rate using the following formula: L = L0 (1 + ΑΔT) where: L: length after changing L0: original length, Α: the expansion / contraction coefficient, for aluminum extrusions, in -40 ° C +50 ° C range, the value is 2.4 × 10-5 / ° CΔT: the temperature (Celsius) changes in the value calculation example: aluminum alloy original length of 1 m, the temperature change is +50 ° C-40 ° C = 90 ° CL = 1M (1 +2.4 × 10-5 ° C × 90 ° C) = 1.00216M
That is: 1 meter long aluminum profiles in the 90 ° C temperature variation will produce 2.16MM length variation. Aluminum windows and doors for the corner only rigid connection strength is that this change will have devastating effects, so that doors and windows corner mutual position of the parts disorder or deformation, reflected in the corners of windows and doors undoubtedly fatal flaw . This defect is any bolts or rigid connections Corner machine is no way to make up.
Secondly, in the production of aluminum windows and doors, installation process, due to handling, transport, installation and construction errors when moving, as well as doors and windows installed, aluminum windows and doors to withstand long-term effect of their own weight, withstand window openings, building wall static deformation stress error,truck security seals switching windows, air pressure, environmental impact and frequency of sound waves of varying peak vibration, the vibration can sometimes induce resonance doors, impact on the overall strength of windows and doors.