Extrusion defects. Aluminum profile extrusion process for extruding device is complete, the extrusion technology is mature and that improper operation, such as bubbles, inclusions, flaws such as distortion, chromatic aberration, and affect the quality of aluminium profiles.
Oxide film thickness. National standard architectural aluminum oxide film thickness should be not less than 10um (micrometer). Thick enough to aluminum surface and corrosion, corrosion. Sampling some of the no name and address, license, certificate of aluminum, oxide film thickness of only 2-4um, some not even film. According to experts ' estimation every 1um oxidation film thickness, profile can reduce power consumption costs over more than 150 yuan per ton.
Chemical composition is not eligible. Mixed with a lot of complex aluminum, aluminum scrap aluminum can significantly reduce costs, but can lead to chemical composition of architectural aluminum profile qualified, serious threat to construction safety.
Reduce the profile thickness. 90 series sliding window type, according to national standards for the minimum wall thickness for aluminum is not less than 1. 4mm, some products only 0. 6-0. 7mm。 46 series spring door-standard aluminium wall thickness minimum of not less than 1. 62mm, sampling, only 0. 97-1. 18mm。
Substantial reduction in poor-quality aluminum closure time, reduce chemical reagent consumption, cost reduction, corrosion resistance is greatly reduced profiles.