The alloy is made of Al, Mg and Si as the main elements. Each element has a certain amount of content. The price of magnesium is high. In order to reduce the cost, some manufacturers reduce the amount of magnesium to the minimum allowable content. Some even worse, the content of magnesium is lower than the minimum content promised.
压花铝卷, 涂层铝卷, 斑纹铝卷,防锈铝卷，还有的厂在合金中加废电线和废盆废铝锅，根本谈不上6063合金。致使铝型材机械强度很低，可以低到用两手一弯很简单曲折，俗称象面条相同软。这就是铝材为什么能廉价几千元原因之一。
Embossed aluminium coil, coated aluminium coil, striped aluminium coil, rust-proof aluminium coil, and some factories add scrap wire and scrap pot to the alloy, which is far from 6063 alloy. As a result, the mechanical strength of aluminium profiles is very low, which can be as low as simple and tortuous as bending with both hands, commonly known as the same soft noodles. This is one of the reasons why aluminium can be cheaper by thousands of yuan.
Aluminum alloy smelting furnace
How to melt the matched 6063 alloy and what kind of furnace to use are also very important. Now the domestic selected furnace is at the level of the 1940s, but also in the 1990s. The worst manufacturer uses the original crucible boiler. There are coal-fired, oil-fired, gas-fired and electrically heated smelting furnaces.
Some stoves have chimneys, others have no chimneys. Generally used is square furnace (rectangular furnace), advanced is circular furnace, some circular furnace can tilt pour aluminium. On the tonnage, there are one ton, two tons, five tons, ten tons, twenty-five tons and fifty tons of aluminium melting furnace.
压花铝卷, 涂层铝卷, 斑纹铝卷,防锈铝卷，比较先进一点的，在熔铝炉下面再加一个静置炉、静置炉重要配制6063合金用，可在此炉内除渣除气，静置，然后再铸造铝棒，铝天花吊顶以供揉捏运用。在原始烧煤的炉子中和现代圆形炉配制的合金质量，肯定不相同。
Embossed aluminium coil, coated aluminium coil, speckled aluminium coil and rust-proof aluminium coil are more advanced. Adding a static furnace and a static furnace under the aluminium melting furnace to prepare 6063 alloy can remove slag and degasse in this furnace, and then put it in a static position, and then cast aluminium rod and aluminium ceiling for kneading and kneading. The quality of alloys prepared in original coal-fired furnaces is certainly different from that in modern round furnaces.
In general, no matter what kind of fuel is burned, there should be a flue gas. Most of the waste gas and slag produced during the combustion of fuel can be discharged from the flue gas. If all the waste gas and slag without chimney are melted in aluminium water, then the aluminium rod for kneading is cast. There are serious slag bubbles in the rod, which is one of the reasons for the poor quality of aluminium material and also one of the reasons for the low price of aluminium. Coloured aluminium roll
The level of domestic foundry equipment is also far from each other. The oldest foundry equipment in China is 40's level of iron mould casting, and advanced hydraulic semi-continuous casting.
The crystallization arrangement of cast rod in iron mould casting is very poor, and there are a lot of slag and bubbles in the cast rod. The quality of the cast rod is very poor. Now the horizontal casting (also known as continuous casting) and semi-continuous casting are widely used in factories. Most of the wire rope transmission in semi-continuous casting is the best hydraulic transmission. The length of semi-continuous casting rod varies from 3 meters, 4 meters to 8 meters.
Semi-continuous casting is pit-type, casting while falling, cooling around with cold water, because the water cooling around is uniform, the rod crystallization arrangement is uniform and fine. But the downward transmission of wire rope is not as smooth as that of hydraulic transmission. The appearance of hydraulic casting rod is smoother than that of other casting rods.
China's profile kneading machine is the most complex in the world, with a wide range of grades. There are factories'own simple kneading machines, reformed with extruding plastics machines, and a few domestic kneading machines of good and bad quality. The same casting rods have the same quality of extruded profiles.
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