1 extrusion defects. Aluminum extrusion extrusion equi […]
1 extrusion defects. Aluminum extrusion extrusion equipment is complete due process, extrusion process is ripe and the operation is improper, can produce such as bubbles, inclusions, layer, color, distortion and other defects, affecting the quality of aluminum profiles.
2 the film thickness is thin. The national standard architectural aluminum oxide film thickness should be not less than 10um (m). The thickness is not enough, the aluminum profile surface is easy to rust and corrode. Some no name and address, production license, certificate of inspection in the aluminum oxide film, the thickness of only 2 to 4um, some even without film. According to experts estimate that each reduction of 1um oxide film thickness, each ton profiles can reduce power consumption, cost more than 150 yuan.
3 the chemical composition is not qualified. The incorporation of impurities of aluminum, aluminum scrap aluminum can greatly reduce the cost, but will lead to building aluminum unqualified chemical compositions, seriously endanger the safety of construction engineering.
4 reduce the wall thickness of profiles. 90 series sliding window type, according to the national standard of the aluminum minimum wall thickness not less than 1.4mm, some products only 0.6 to 0.7mm. 46 series of door type, aluminum wall thickness using the national standard minimum of not less than 1.62mm, sampling, some products only 0.97 to 1.18mm.
5 poor quality aluminum reduction in sealing time, reducing the loss of chemical reagents, cost down, but the corrosion resistance of the profile is greatly reduced.http://www.jiayunaluminium.com/