[China Aluminum Industry Network] With the rapid development of China's economy, large-scale public buildings and high-rise buildings have developed rapidly. As a material facade with light weight, high strength, thinness, large surface, and fine characteristics, it is rapidly applied to various fields. Among the buildings, the external protective structures of office buildings, commercial buildings, sports venues, convention centers, cultural facilities, transportation hub buildings, etc., all use building curtain walls as the characteristics of the development of the times. Due to the rapid development of the construction industry, the building curtain wall is centered on the comfort of human settlements, and energy saving and environmental protection technologies are the main points of development. Various large-scale, thin-walled, high-precision, and complicated structural high-end building curtain wall profiles have emerged as the times require. Aluminum alloy profiles have a series of excellent properties such as low density, high specific strength and specific rigidity, corrosion resistance, beautiful and durable, easy to form, surface treatment, recyclable, energy saving and energy saving. Therefore, aluminum alloy profiles are used in the field of building curtain walls. It is a long-lasting material. From 2005 to the present, building curtain wall products will continue to maintain steady growth, development and maturity, and various large-scale flat-width, thin-walled, high-precision, complex structures of high-end architectural aluminum curtain wall profiles and broken bridge curtain walls will also be born and spread. application. It has also greatly tested the production capacity and technical strength of the aluminum profile manufacturers and the development of matching, in the production process of aluminum alloy curtain wall profiles, how to ensure that the supporting production on time and quality delivery, which is a lot of manufacturers will encounter thorny problem. Caused by this situation: whether the manufacturer's hardware facilities can meet the production requirements, mold processing and mold repair technology, the process of each process control is to achieve a better state, the process of production management control is reasonable, etc. . Will delay the delivery schedule, especially in the face of some complex structure, strict surface treatment of large-scale aluminum alloy production, it is even more helpless. Fine Specialty Chemicals, Textile Chemicals, Speciality Chemicals Dynasty Chemicals (NingBo) Co., Ltd. , http://www.dychemco.com
From 1983 to 1994, China mainly produced component-type, open-framed glass curtain walls, with a single structure that mimics foreign technology, no local industry norms and standards, and a low level of technical quality.
From 1995 to 2002, in early 1995, the Aluminum Doors, Windows, and Curtain Wall Committee of the China Building Metal Structure Association was established. This is a symbol of the progress of China's curtain walls. During this period, in addition to the glass curtain wall, the development of hidden frames, aluminum panels and stone curtain walls, the development of the unitary curtain wall, the introduction of point support curtain wall in 1995, while the introduction of foreign technology, began to combine the national conditions have been innovative.
So how can we ease or solve this problem?
1. Casting is the source: The quality of extruded aluminum rods has a decisive influence on the quality of the output. High-quality extruded aluminum rods are the basis for obtaining high-quality aluminum profiles. To obtain high-quality aluminum rods, advanced equipment, mature casting processes, and excellent management technicians are required. Using advanced and reasonable casting process, according to the metallurgical characteristics of the selected alloy, select the appropriate melting temperature, shorten the melting time as much as possible, and pay attention to the cleaning of the tool and the purity of the refining agent to ensure the quality of the melt. A number of degassing and deslagging processes are used to eliminate the presence of gas and slag as much as possible, and online degassing processes are used when necessary. Before casting, the secondary molten foam ceramic filter plate can be used to filter the alloy melt, further reducing the inclusion content in the melt and purifying the melt.
2. Mold and extrusion are the main body: The mold is the basis of the extrusion process, and it is also one of the key technologies for the production of high-end curtain wall profiles. It not only determines the shape, dimensional accuracy, and surface state of the extruded product, but it also affects the extrusion and the organizational properties of the product. Good models must be based on high-quality materials, designers, advanced machining equipment and skilled repair technicians to design and process high-quality molds, especially porous molds. The porous molds are used to increase production capacity and ensure the delivery of supporting documents. Another guarantee. The extrusion is the carrier of the mold and they are dependent on each other. Reasonable selection of the extrusion process is the key to the formation of the profile and the long life of the mold, and it is also the key to the technical task of our production. (1) According to different alloys, the heating process of aluminum rod before extrusion is reasonably selected. When the aluminum rod passes a certain temperature range when it is heated slowly, the Mg2Si phase is easily precipitated. Therefore, it is necessary to rapidly heat the aluminum rod to a faster speed. Precipitating the temperature zone through Mg2Si phase; (2) Choosing a reasonable squeeze tube temperature and die temperature. When extruding, the die temperature changes greatly, and controlling the die cooling temperature is the key. It is necessary to strictly control the cooling intensity to prevent the thermal stress of the die from being too large and cause failure. At the same time, we must ensure that the mold temperature is within the normal range to prevent leakage of the cooling medium to the work zone and affect the extrusion quality. (3) Select the proper outlet temperature and cooling process. The outlet temperature should be controlled within the preferred quenching temperature range. Use a matching traction system to control the discharge deformation. Rapid cooling with strong wind or water mist to ensure the mechanical performance of the profile to complete the billet production.
3. The surface treatment is makeup: different surface treatment methods, so that the profile has a variety of makeup. The quality of the surface of the product depends on our control of various process parameters and is strictly enforced. The improvement of production efficiency stems from practice. It stems from our reform and innovation of technology. Technological reform and innovation often come from some simple ideas. We then work hard to verify and implement it, and ensure the smooth delivery of supporting production.
Curtain wall technology continues to develop, and design concepts and areas are constantly innovating. From the traditional, high-energy-consuming design concept, we have shifted to low-energy, ecological, and healthy design concepts. At the same time, it has also entered the fields of architecture, functional sciences, structural sciences, surface materials, and extensions. In the area of ​​face materials and extensions, we are concerned and valued by our aluminum manufacturers, such as the development of double curtain walls, photovoltaic curtain walls, sun visor curtain walls, ecological curtain walls, smart curtain walls, membrane structure curtain walls, dynamic curtain walls, and large structures. Curtain walls, etc., all require a large number of profiles that require thinness, fineness, and high surface quality. In terms of surface treatment, in the future, the development trend of the surface treatment of aluminum profiles is to develop and promote clean, environment-friendly and high-efficiency energy-saving technologies. The specific performance of the aluminum surface treatment is: the chemical treatment process of acid-free and chromium-free prior to spray dusting, high-speed and high-efficiency Anodic oxidation technology, development of electrolytic coloring in the direction of multi-colorization, closed loop recycling technology and equipment of tank fluids, wear resistance, scratch resistance, and ultra-strong weather resistance electrophoretic coating.
To adapt to this development trend, we must use reasonable and advanced mechanical equipment and facilities in the production of large-scale high-end aluminum alloy curtain wall profiles. We must also have a strong management team to constantly learn new scientific knowledge and apply it to production. To ensure that the products produced are advancing with the times, they will not be abandoned by the rapidly developing construction industry, and they will also be required to provide guarantees and escort for future developments.