How to judge the pros and cons of aluminum profiles and aluminum alloy doors and windows?

by:Zeyi     2021-06-05
In the early 1980s, my country began to adopt architectural aluminum products, and it has rapidly developed into the world’s first place. The main reason for the rapid development of my country’s architectural aluminum products is: the introduction of aluminum and aluminum alloy doors and windows production lines from more than a dozen foreign countries. The directors of various countries insist on digestion and absorption is one of the important reasons. Due to the rapid development speed, many problems have also arisen: for example, the national construction aluminum manufacturer has rapidly increased, and the production volume is too large. Therefore, in the aluminum profile industry, production exceeds sales, and the production capacity of aluminum alloy doors and windows has increased. Although the demand for aluminum doors and windows has increased rapidly, the aluminum alloy doors and windows industry is still in a situation where there are too many people. In order to complete the task, some aluminum alloy door and window manufacturers use all means to deceive users to deliberately lower the project quotation, and then use the inferior to replace the superior and the fake to replace the real to achieve the purpose of making money. Therefore, everyone Don't just try to be cheap, ignore quality, and be deceived. So, how to judge the pros and cons of aluminum profiles and aluminum alloy doors and windows? 1. How to choose to buy aluminum profiles in many domestic aluminum factories. Due to the different conditions, the aluminum materials produced by the aluminum factories are also very different, and the sales prices vary greatly, but the difference is 4 to 5 thousand yuan per ton. In fact, the domestic price of aluminum ingots is basically the same. In the process of processing, there is such a big price difference, and there is definitely a big difference in quality. The quality of aluminum profiles is determined by the following major factors: 1. Alloying elements: 6063 alloy is an alloy made up of aluminum, magnesium, and silicon as the main elements. Each element has a certain range of content, and the price of magnesium is high. In order to reduce costs, some aluminum profile manufacturers reduce the amount of magnesium to the minimum allowable content. Some even lower the magnesium content below the minimum allowed content. Regular aluminum profile manufacturers have internal standards when formulating alloy components, that is, within the range of various element content, each plant has a small range of changes, and the ratio of aluminum, magnesium, and silicon is very strict. Each factory has its own data and keeps each other confidential. Only the alloy made with qualified formula can guarantee the quality, otherwise the quality will not be improved on how to process it in the future. 2. How to melt the 6063 alloy equipped with aluminum alloy smelting furnace and what kind of furnace to use is also very important. Now domestic furnaces are used in the 1940s and 90s. The worst aluminum profile manufacturers use the original Crucible boiler. There are coal-burning, oil-burning, gas-burning and electric heating smelting furnaces. Some stoves have chimneys, and some have no chimneys. The most commonly used are square furnaces (rectangular furnaces), the advanced ones are round furnaces, and some round furnaces can be tilted to pour molten aluminum. According to the tonnage, there are 1 ton, 2 ton, 5 ton, 10 ton, 25 and 50 ton aluminum melting furnaces. More advanced, add a static furnace below the aluminum melting furnace, which is mainly used for preparing 6063 alloy. The furnace can be used for slagging, degassing, standing, and then casting aluminum rods for extrusion. 3. The level of domestic casting equipment for alloy casting is also very different. The oldest domestic casting equipment is iron mold casting at the level of the 1940s, and the advanced hydraulic semi-continuous casting. The crystalline structure of iron mold casting rods is very poor, and there are a lot of slag inclusions and bubbles in the rods. The quality of the casting rods is very poor. Now the more common ones used in general factories are: horizontal casting (also called continuous casting) and semi-continuous casting , Semi-continuous casting most of the wire rope drive, the best hydraulic drive. The length of semi-continuous casting rods varies from 3 to 4 meters to 8 meters. Semi-continuous casting is a pit type. It is lowered while casting, and is cooled with cold water on all sides. Due to the uniform water cooling, the crystal structure of the casting rod is uniform and fine. However, the downward transmission of the steel wire rope is not as stable as the hydraulic transmission. The surface of the hydraulic casting rod is smoother than other casting rods. The smooth surface of the cast rod is one of the prerequisites for extruding a good profile. The surface of the cast rods cast by other methods is relatively rough. In order to ensure the quality of the profile, sometimes the cast rods are cut first to remove the rough appearance of the cast rods. There are many aluminum factories in China that do not have the equipment to produce aluminum rods. Instead, they purchase 6063 alloy rods from electric aluminum factories or other factories. For such aluminum factories, the quality of aluminum is in the hands of the casting rod factory, and the aluminum produced is It is difficult to achieve stable quality. Compared with advanced casting equipment, the use of backward equipment is that the investment is small and the production cost is low, which is one of the reasons why the sales price difference of aluminum is large.
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