As the saying goes, greedy small cheap, will suffer a big loss. Today's market, no matter which line it is, has always won the hearts of the people since ancient times, and the door and window industry that we are all familiar with is no exception!
Broken bridge aluminum doors and windows in thermal insulation, environmental protection, noise and other aspects of the comprehensive effect is very good, is the current market is more popular doors and windows. But the price of aluminum doors and windows in the market is very chaotic.
Some businesses offer low prices and use inferior materials for processing, such as aluminum profiles made of recycled aluminum, or profiles with material thickness far lower than national standards.
Poor quality bridge broken aluminum doors and windows have serious problems, one is not strong; the other is easy to aging; the third is the large deformation rate of thermal expansion and cold contraction, which greatly reduces the thermal insulation coefficient, and the whole window is in danger of falling apart after a long time.
According to Xiaobian's understanding, plastic may be used to replace nylon in the middle of the broken bridge and there are many such examples. This phenomenon exists in many of these small OEM factories.
Selection method of broken bridge aluminum doors and windows
Pit identification 1:
The sealing strip has good difference. Its main function is to make the glass and frame leaf closer through the sealing strip and the inner leaf, so as to ensure the air tightness of the bridge broken aluminum doors and windows. The inferior sealing strip will make the broken bridge aluminum window leak.
Purchase method: sealing strip is very important! It is recommended to choose EPDM or elastomer tape, which has good heat insulation effect. It is an environmentally friendly adhesive strip, and can be recycled and not pollute the environment.
Pit identification 2:
The thickness of profiles is not enough. All the aluminum ores mined are melted into pure aluminum ingots, and then melted. Other metals are added to make aluminum alloy rods, and then the profiles are drawn into various profiles by profile machine. It is better to process them into window frames.
How to choose and buy: the big brand bridge broken aluminum profiles are all in line with the national standards. The miscellaneous brands may use the waste aluminum to make aluminum rods, while the small brands are fake German brands, but the wall thickness is not more than 1.2mm
Pit identification 3:
Some small door and window brands use plastic instead of PA66 as spacer, which is brittle and not resistant to aging; some use ordinary PVC heat insulation strip, or nylon PA66 heat insulation strip to make articles on the heat insulation strip.
Purchase method: normal should use PA66 nylon strip, high temperature resistance, not afraid of expansion. PA66 nylon strip can be broken by hand, but PVC insulation strip can not be broken after repeated more than ten times.
Pit identification 4:
No matter how good the broken bridge aluminum doors and windows are, if the hardware is not good, it will also affect the sealing, heat insulation and heat preservation performance. However, good hardware can ensure that the windows can be opened and closed smoothly for decades. When buying windows, it is unclear whether the hardware is imported or not
Purchase method: if hardware is included in the unit price, or free, it is better not to be cheap, because such things are often not good hardware, hardware to choose the brand.