Production Mode of Broken Bridge Aluminum Doors and Windows
There are two main ways to produce insulating profiles: one is to use insulating strip material and aluminium profile to form "insulating bridge" through mechanical teeth opening, piercing and rolling, which is called "piercing strip" of insulating profiles; the other is to pour insulating material into the insulating chamber of aluminium alloy profiles, solidify and remove the metal of the bridge. The formation of "insulating bridge" is called "casting type" insulating profile.
The inner and outer sides of heat insulation profiles can be profiles of different sections or profiles of different colors with different surface treatments. However, due to the influence of region and climate, it is avoided that the linear expansion coefficient of insulation materials and aluminium profiles differs greatly, resulting in greater stress and clearance between them during thermal expansion and cold contraction. At the same time, thermal insulation materials and aluminium profiles are combined into a whole, and they are also subjected to the same force as aluminium profiles in doors, windows and curtain walls. Therefore, it is required that the insulation material must have the similar tensile strength, flexural strength, expansion coefficient and elastic modulus to the aluminum alloy profile, otherwise the insulation bridge will be broken and destroyed. Therefore, the selection of insulation materials is very important.