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Architectural Aluminum Industry
Aluminum is a type of architectural decoration of structural materials, to enhance its decorative effect, to improve resistance to corrosion and extend the period of use, in addition to individual circumstances, have to go through the surface treatment. Therefore, the production of architectural aluminum surface treatment has become indispensable for a very important process. There are many ways of dealing with the surface can be used for other purposes in accordance with the material for surface treatment. Commonly used commercial surface treatment methods are: oxidation anodic coloring method, electrostatic powder method, fluorocarbon spraying, electrophoresis coating, chemical dye method, processing watermarking method.
China Architectural Aluminium Extrusion Company except for a few outside the factory has its own surface treatment production line, China has eight specialized aluminum surface treatment company in Guangdong province.
Melting and casting ingot
Architecture aluminum melting and casting in the production process is a critical process, the right profile of the mechanical properties and properties surface play a decisive role. Therefore, all businesses alloy melting, purification and homogenization attach great importance.
Currently, about 70% of the construction is aluminum with the same level of hot runner up production of ingots extrusion system, is introduced in the United States casting machine of the world advanced 17 jointly, Nanping Aluminium for fully automated, Hing Fat aluminum profile factory Co., Ltd. first introduced in 1989, the team. China now has basically mastered the manufacture of these equipment, technology and the whole casting process ingots. 2008 China's domestic production of about 155 units at the same level of the machine hot runner over.
China has also introduced five units within the British black guide gemu Lin hydraulic casting machine. National round ingot casting machines of the total production capacity a 6000kt, put it aside for about 1200 games foundry furnace group.
Chinese companies to build aluminum smelter extrusion regeneration put it aside, not many, about 38%, the rest can not be recovered waste heat, the first high thermal efficiency up to 55%, which is lower, and some do not and 30%. Therefore, the industry average thermal efficiency of almost 45%, compared with over 65% of the industrially is much less developed, but less than 33% of the total internal energy and high a lot.
Over extrusion plants in China are melting store, there are about more than 85% of the ingot is produced by extrusion plant itself, while the industrially developed countries have more than 70% of casting of aluminum ingots by the factory or production plant professional. The internal situation should be improved. Most have aluminum extrusion plant bullion in the industry can improve economic efficiency, saving energy and raw materials, environmental protection is also useful. At present, there a series of large aluminum plants have been built or are building casting ingots of high technology.
Mold
Aluminum Extrusion is one of the teams, the price of about 8% of the cost of producing aluminum. To prolong the life of the dies to reduce production costs are important. Plant medium-sized enterprises of China's architectural aluminum extrusion are mostly with mold manufacturing workshop, but Some mid-sized companies and almost every small business is purchased or hired to shape the company's professional mold manufacturing. China has 275 companies construction are not producing aluminum molds, accounting for 49.11% of the total number of companies.
China mold materials, design, fabrication, surface treatment, the technology of mold repair and size detection technology, life, etc and there is a large gap among industrialized countries, CAD CAM technology is not widespread, die average life expectancy is only 6, 7 tons, far from industrialized countries more than 20 tons. There are many factors that affect the life matrix, such as composition and manufacturing methods, design, surface treatment, Technology mold repair, large or small, have a relationship. Therefore, improving the lives of dying is a complicated systematic project, the need for longer-term development.
Window insulation energy saving aluminum cold bridge
In recent years, the Chinese construction market in the rapidly developing energy saving doors and plastic windows, has represented a market share exceeding 35%. As the area of the window frame of the door of about 30% of the entire window area, so in order to achieve the goal of an effective energy saving moisture, the door frame material selection window very important. Europe and the United States from 20 years of money from countries in developing Asia-saving highly energy efficient windows, aluminum doors and materials: insulation against the cold bridge aluminum window profiles the door frame, its energy efficiency savings compare favorably with those of steel.
Since the 20th century, since the early 90s, China has introduced a production line aluminum heat production capacity of approximately 420kt a. The production process of this profile are: balancing method and perfusion. The first dominant. Rolling compartment law (not working) Heat is a band of glass fiber reinforced polyamide nylon 66, the resistance of aluminum alloy 6063 with a remarkable, not only have a high insulation performance, and can be used for the screw, rubber injection method used in polymer gel no.
Building the relationship between aluminum and industrial aluminum profile
Extrusion generally divided into two categories according to purpose: First, aluminum construction and structural aluminum, industrial profile 2. "Construction" refers mainly to the doors, windows, parapets, walls and other types of use of the profile, and "structure" refers to the stadium, airport terminals, hangars, warehouses and other force structure ceiling, activity rooms, bridges, streets and roads and other facilities relevant to the framework. In addition to the profiles of the industry relates to the use of buildings and other structures used in aluminum all applications.
A survey shows that the proportion of China's industrial aluminum 28%. With the rapid industrial development in China, aluminum will become increasingly industrial largely expected in 2012 can explain 45% or higher. However, at least in the foreseeable period of time did not meet 70% of possibilities.
In accordance with international practice, the extrusion of industrial uses are divided into: transportation, consumer durables, electronic equipment, machinery and equipment, containers and packaging. extruded aluminum in China are divided into construction materials and industrial materials is reasonable.
Aging
Aluminium Mg If architecture is AL alloy extrusion, and to go through an artificial aging treatment. National Architectural Aluminum Manufacturer of about 1350 units aging furnace, with a total processing capacity of about 4500kt a. managing the China of 6063 system type alloy profiles several of the 200? ~ 1.5h 2h isolation, instead of 175? 8h better insulation system, although the mechanical properties to the standards requirements, but the yield potential of the alloy has not been fully realized. Also in the extruder when the cooling rate of cooling is generally not sufficient, that the profiles temperatures in recent typhoon machine especially in the 300?.
Extrusion output
1979 ~ 2008, China 30 years and the average production of extruded aluminum architectural annual growth rate of 38.28%, the real momentum sustained, stable and fast development in the Extrusion aluminum in the world is unprecedented in the history of industrial development.
30 years of reform and openness, China's total production of aluminum extruded to 39.544.385kt, the total production of extruded 28475.135kt building, the industrial production of extruded profiles 11069.25kt, tightening of the accounts production of construction materials for the production of extruded profiles of 72.0%, and other industrial extruded profiles of total profiles of total 28%. If the squeeze tube is counted, then the proportion of industrial extrusion materials will be higher.
Extruded aluminum import and export and apparent consumption
1984 ~ 2008 China's apparent consumption of aluminum extrusion was the general upward trend, from 2008 production 7553.472kt Chinese aluminum extrusion, 62.035kt import volume, export volume 262.730kt, net imports to 200.695kt, apparent consumption 7352.777kt. Due to the global financial crisis in 2008, net exports fell.
China was the last century, the late 80s and early 90s has There was a net exporter of this phenomenon, but in 2001, China became a net exporter of aluminum continuous, and with China's accession to the WTO and the market China aluminum, improving competitiveness and strengthening foreign trade, the profiles of net exports increase every year.
Chinese aluminum exports in 2008, the average price of U.S. $ 2,921.09 t, the average price of imported aluminum t 3289.52 U.S. dollars, the average price imported aluminum higher than that of exports by 12.7%, showing that imports are higher value-added or national currently can not produce high-aluminum precision technology alloy industry. However, the price difference between import and export of aluminum is not that the quality of the round aluminum China to catch up with the world advanced level.
Since the last century, China has been since the mid-90 aluminum doors and windows and their frames and thresholds, aluminum and structural parts of a net exporter, and the volume of net exports increased year after year 1998, net exports 41.064kt 2008 553.928kt years, 10 years, an increase of 12.5 times the average annual increase of 31.52%.
1999 import and export of doors and windows Aluminum price difference per unit U.S. T 3559 dollars, while in 2008 this value is 3999 t of U.S. dollars, but in 1999 the unit price of imports of aluminum doors and windows of the unit price of exit doors and other high 172.8%, while the years 2008, the ratio of reduced to 107.8%. This can be shown, the added value of imports of aluminum doors and windows is much greater than exports, but this value decreased rapidly, indicates the quality of Chinese products in a wide margin.
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