How to distinguish the pros and cons of aluminum and aluminum doors and windows

by:Zeyi     2021-09-10
The rapid development of China's construction aluminum products is the main reason that led to the rapid development of my country's construction aluminum products: the introduction of aluminum and aluminum door and window production lines from more than a dozen foreign countries, and the strength of each country, insisting on digestion and absorption is one of the important reasons .   Due to the rapid development speed, many problems have also arisen: for example, the number of manufacturers of construction aluminum materials in the country has increased rapidly, and the production volume is too large, and the supply exceeds the demand. As a result, the production volume of some small aluminum manufacturers fails to meet the design targets, and the competition for aluminum sales is becoming more and more fierce. There are also more than 4,000 aluminum door and window manufacturers (excluding family workshops). Although the construction industry has developed rapidly in the past two years, the demand for aluminum doors and windows is far less than the supply of aluminum materials. Therefore, in the aluminum industry, production exceeds sales, and the production of aluminum doors and windows is large. In order to get orders, some aluminum door and window factories use all means to deceive users to deliberately lower the project quotation. , We still have to achieve the purpose of making money, so we must not just try to be cheap, regardless of quality, and be deceived. Here is a brief introduction on how to distinguish the pros and cons of aluminum and aluminum doors and windows:    1. How to choose aluminum profiles: Due to various conditions, the aluminum materials produced by many domestic aluminum manufacturers vary greatly, and the sales prices are also relatively large The difference can be 4 to 5 thousand yuan per ton. The domestic price of aluminum ingots is basically the same. In the process of processing, there is such a big price difference and a great difference in quality. The quality of aluminum profiles is determined by the following major factors:   1, alloying elements: 6063 alloy is an alloy prepared with 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 manufacturers reduce the amount of magnesium to the minimum allowable content. Even worse, the magnesium content is lower than the minimum allowable content. There are also factories that add waste wires and waste aluminum pots to the alloy, basically not talking about 6063 alloy. As a result, the mechanical strength of the aluminum profile is very low, it can be so low that it can be easily bent with both hands, and it is commonly known as soft as noodles. This is one of the reasons why aluminum can be thousands of dollars cheaper. Regular aluminum manufacturers have internal standards when formulating alloy components, that is, within the range of various element content, each factory has its own smaller 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 is used are also very important. Now domestic furnaces are used in the 1940s and 90s. The worst manufacturers use the original crucible boilers. . 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. In terms of tonnage, there are one, two, five, ten, twenty-five, and fifty-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 and degassing, standing, and then casting aluminum rods for extrusion. The quality of the alloy prepared in the original coal-fired furnace and the modern round furnace is absolutely different. Generally, furnaces should have a chimney no matter what fuel is burned. Most of the waste gas and slag produced during the combustion of the fuel can be discharged from the chimney. If all the flue gas and waste slag are melted in the aluminum water, so that the aluminum rod for extrusion is cast, there are serious slag bubbles inside, which is one of the reasons for the poor quality of aluminum and one of the reasons for the cheap aluminum price.  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 one is 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 rods is poor. Nowadays, horizontal casting (also known as continuous casting) and semi-continuous casting are more commonly used in general factories. , Semi-continuous casting most of the wire rope drive, the best hydraulic drive. The length of semi-continuous casting rods varies, generally from 3 meters, 4 meters to 8 meters. 
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