1. Honeycomb plate alloying element
The honeycomb plate 6063 alloy is an alloy prepared by using aluminum magnesium silicon as a main element, and each element has a certain range of content, and the price of magnesium is high. In order to reduce costs, some manufacturers use less magnesium to the minimum allowable content. In some cases, the magnesium content is below the minimum allowable content. In addition, the factory added waste wires and waste aluminum aluminum pans to the alloy, which is basically not the 6063 alloy. The aluminum profile is mechanically low in strength and can be easily bent with two hands and one bend, commonly known as soft noodles. This is one of the reasons why honeycomb panels can be thousands of dollars cheaper.
Regular honeycomb panel manufacturers have internal standards when formulating alloy components. Within the range of various elemental contents, each factory has their own smaller range of variation. The ratio between aluminum, magnesium and silicon is very strict. Each factory has its own data and keeps it confidential. An alloy made of qualified formula can guarantee the quality, otherwise it will not be processed in the future.
2. Honeycomb plate aluminum alloy melting furnace
It is also crucial to have a good 6063 alloy for melting. The furnaces used in China are now in the 40s level, and also in the 1990s. The worst manufacturers use the original 坩 boiler. There are coal-burning, oil-burning, gas-burning and electrically heated melting furnaces. Some stoves have chimneys, and some have no chimneys. Generally used are square furnaces (rectangular furnaces), advanced ones are circular furnaces, and some circular furnaces can tilt down aluminum water. On the tonnage of one ton, two tons, five tons, ten tons, twenty five tons and fifty tons of molten aluminum furnace. More advanced, add a static furnace under the aluminum melting furnace, static furnace is important to prepare 6063 alloy, in which the slag can be degassed, allowed to stand, and then cast aluminum rod for extrusion. The quality of the alloys formulated in the original coal-fired furnaces and modern round furnaces is absolutely different. In general, the furnace should have a chimney regardless of the fuel burned. Most of the waste gas generated from the combustion of the fuel can be discharged from the chimney. If no smoke pipe exhaust slag is completely melted in the aluminum water, the aluminum rod for extrusion is cast, and there is a serious slag bubble inside, which is one of the reasons for the poor quality of the honeycomb plate, which is one of the reasons for the low price of aluminum.
3. Honeycomb sheet alloy casting
The level of domestic foundry equipment is also very different. The oldest casting equipment in China has iron mold casting in the 1940s and advanced semi-continuous casting in hydraulic pressure. The mold structure of the cast iron casting bar is very poor, and there are a lot of slag inclusions and bubbles in the cast rod. The quality of the cast rod is very poor. Nowadays, the general use of the factory is horizontal casting (also called continuous casting) and semi-continuous casting. , semi-continuous casting of most wire rope drives, the best hydraulic drive. Semi-continuous casting rods vary in length, typically 3 meters, 4 meters up to 8 meters. The semi-continuous casting is a pit type, which is lowered while casting, and is cooled by four sides with cold water. The crystal structure of the cast rod is uniform and fine due to uniform water cooling. However, the wire rope is driven downwards, which is not as smooth as the hydraulic transmission. The surface of the cast rod of the hydraulic casting is smoother than the surface of other cast rods. Smooth surface of the cast rod is one of the prerequisites for the extrusion of the profile. The surface of the cast rod is cast by other methods. The surface of the cast rod is rough. In order to ensure the quality of the profile, the cast rod is sometimes used for the first time, and the car is used to cast the rough appearance of the rod. The commonly used semi-continuous casting mold is an advanced, hot-top and horizontal casting mold. The characteristics of this casting mold can be cast several to several dozen at a time, and the casting quality is good. With high-quality 6063 aluminum alloy casting rod In order to be able to produce a good aluminum profile, it is impossible to produce a good aluminum profile if it is impossible to cast a good cast bar with the original old casting equipment. There are many honeycomb board factories in China, and there is no equipment for producing aluminum rods. Instead, they purchase 6063 alloy rods from electric aluminum plants or other factories. The honeycomb board factory, the quality of honeycomb panels is in the hands of the production of rod-making factories, and the honeycombs produced. It is difficult to achieve stable quality. The use of backward equipment is better than the use of advanced casting equipment. First, the investment is small and the production cost is low. This is one of the reasons why the sales price of honeycomb panels is large.
4. Honeycomb sheet extrusion
There are many types of profile extrusion machines in China, and the grades are very high and low, which is also the highest in the world. There is a factory's own simple extruder, which is modified by a squeeze plastic machine. There are a small number of domestically produced ones, and most of them are Japanese, American and German, and have hydraulic pressure and oil pressure. In short, hundreds of domestic extruders are varied. It is generally believed that Japanese, American, and German extruders are better. Good and bad extruders, the same cast rods, the quality of the extruded profiles is no different. We often see 6063T5 for aluminum doors and windows in the building, which is the international standard for American brands.
The Chinese grades LD31RCS.T5 and RCS both indicate the state, indicating the air-cooled quenching artificial aging state. The quenching of the metal is quenching when the high temperature suddenly drops to a low temperature. For example, the steel blade is hardened and sharpened in the water, and the quenching of the honeycomb plate is also water-quenched and quenched. The 6063 profile for construction is quenched by air-cooling, and the quenched honeycomb panel is placed in the aging furnace for a certain period of time, and the internal crystal of the honeycomb panel is rearranged, and the mechanical strength is obviously improved. Among all metal alloys, only the aluminum alloy is in a aging state.
