​What factors affect the quality of aluminium coils?

What factors affect the quality of aluminium coils? What problems can be encountered? Many customers will have questions. So today we introduce one of the influencing factors of the product quality of aluminium coil - alloy casting.

The level of casting equipment varies considerably from manufacturer to manufacturer. Some of the oldest casting equipment has iron mould casting at the level of the 1940s, and the advanced ones have hydraulic semi-continuous casting. The crystalline organisation of iron mould casting rods is very poor, and there is a large amount of slag and air bubbles in the rods, the quality of the rods is very poor. Now the general factory with the more common is, horizontal casting (also known as continuous casting) and semi-continuous casting, semi-continuous casting most of the wire rope drive, the best hydraulic drive. The length of the semi-continuous casting bars varies, generally from 3m, 4m up to 8m. Semi-continuous casting is a pit type, casting while falling, surrounded by cold water cooling on all sides, due to water cooling around uniform, cast rod crystalline organisation uniform and fine. But the wire rope downward drive, not as smooth as the hydraulic drive, hydraulic casting of the cast bar surface than other cast bar surface are smooth. The smooth surface of the cast bar is one of the prerequisites for a good extrusion profile. In order to ensure the quality of the profile, the surface of the cast bar is sometimes rougher than the surface of the other casting methods, and sometimes the cast bar is first turned with a knife to remove the rough appearance of the cast bar. Now commonly used semi-continuous casting mold, for advanced, hot top with the level of casting mold, the characteristics of this casting mold once can be cast several to dozens, while casting quality is good, with high quality 6063 aluminum alloy casting rod, in order to have the possibility of producing good aluminum profiles, if the original old casting equipment is not possible to cast good casting rod, and simply can not produce good aluminum profiles. There are many aluminum factories without equipment to produce aluminum rods, but to the electric aluminum factory or other factories to purchase 6063 alloy rods, such aluminum factories, aluminum quality in the hands of the production of casting rod factory, the production of aluminum is difficult to achieve stable quality. With backward equipment than with advanced casting equipment, one is a small investment, low production costs, which is one of the reasons why aluminium coils sales differential is large.