1. Aluminum raw materials on the doors and windows of the impact of the group angle
Aluminum profile of the raw materials composition is very important, the raw material is not good, then the strength of the window corners are not up to, high impurities in the raw materials, then the cutting will produce sparks and noise is relatively large, in the group of corners can not be done when the seamless.
2. Aluminum aging determines the strength of aluminum
Aluminum profiles are generally used 6063 (grade), processing state T5 and T6 (air-cooled and water-cooled) water-cooled T6 strength and hardness will be higher, the international aluminum Wechsler hardness is 8°, a window profile can not be all T6, the profile more than 14° hardness will lead to factory processing of the heat insulation strips through the strip burst edge, to do the arc window, shaped window profile bending is difficult plastically is very slow.
3. The precision of the extrusion mould on the precision of the door and window corner precision
Aluminum extrusion mould precision, if the precision of the mould is not enough then the precision of the extruded profile is also not up to the precision of the penetrate bar, spraying precision deviations accumulated together to lead to the overall accuracy of the deviation.
4. The mechanical properties of the design of the strength of the impact
The first thing we have to say is that the profile is not the thicker the better, in the design of the profile should be designed from the perspective of mechanics, to find the point of force, the thick place thick, the location of the force should be thin place thin, so that both the protection of the strength of the door and window profiles, but
also to the door and window hardware play a decompression role.
5. The thermal bar material and the relationship between the aluminum material
Insulation strip material general windows and doors will use PVC material insulation strip looks thicker, some buyers who do not understand will feel more value. High-end doors and windows will use PA66GF25 thermal bar, GF25 is a glass fiber content value, PA66GF25 this material thermal bar and aluminum coefficient of expansion coincides with the press together with better stability.
Before the heat insulation strip and the aluminum material are pressed together, a process should be done: open the teeth. If there is no such process, the contact surface of the heat insulation strip and aluminum is flat, no resistance, no bite, thus affecting the overall strength of the doors and windows. Some manufacturers in order to save costs on the omission of this process, only in the surface of the decorative teeth, the surface looks like open teeth.
6. Surface treatment of profiles
Surface treatment is now common for powder coating, divided into "vertical spraying" and "horizontal spraying" two kinds. Vertical spraying, that is, vertical spraying for windows and doors, so that the spraying out of the effect is better, high adhesion, the corner of the profile location is relatively flat without curvature; profiles and profiles of the contact surface looks like the gap is also relatively small. Horizontal spraying is the oppsite, the general factory of the original color is vertical spraying, and later choose the color and then go to spraying is horizontal spraying.
