What is a cast aluminum compound

【China Aluminum Industry Network】 Composite aluminum profiles are new types of doors, windows and curtain wall building materials linked to aluminum alloy and polymer insulation materials. Through this connection, the center of the aluminum alloy profile forms a heat-insulating sandwich, thereby completing the intention of “insulation aluminum profile”. Insulated bridge composite aluminum profiles are mainly used in both strip and cast type. The strip-type composite aluminum profile is composed of two heat-insulating strips that connect the aluminum profiles to each other, and then hinder the conduction of heat in the aluminum profile surface to complete the energy-saving intention. It originated in Europe and is suitable for the construction of small windows. This is the reason it happened in Europe and survived. But its strength, skills, cost, etc. are not very ambition. The current specification for thermal insulation is PA66, which has two production methods: the hard top method and the traction method. The hard-top method has a tight structure and a good appearance but is relatively brittle. The traction method produces good resistance but has a poor appearance and has a skill depression on the side. In order to seek good looks and accuracy, using PA66 nylon plus ultra-fine glass fiber is a common feature of foreign insulation bars (rarely using other information). Because ultrafine glass fiber is used, the tensile strength is as low as 60N/mm and the price is expensive. The domestic PA66 plus general glass fiber as the main attack direction, has now been a certain break. However, some people use PA6, ABS (styrene-acrylonitrile-butadiene terpolymer), PP (polypropylene), shoddy. Even some people use plastics such as PVC, which can only be used as non-structural materials, instead of engineering plastics PA66 to make insulation strips. Some use mineral fibers and stone powder that seriously affect environmental protection. The main raw material of PVC insulation strip is polyvinyl chloride resin. Because of its low strength, large coefficient of thermal expansion, and toxicity, the relevant authorities of the country have clearly stipulated that the use of PVC to produce aluminum heat insulation strips is not allowed. Casting compound aluminum heat insulation and energy-saving skills originated in the United States. Since the late 30s of the last century, with the extensive use of aluminum doors and windows, some American door and window designers with different energies started thinking about the poor effect of aluminum insulation. Useful for energy-saving skills in handling aluminum profiles. In general, these skills are the combination of high polymer and aluminum profiles. The cast-in-place compound aluminum profile technology represented by American Yasong Company is composed of cast and formed polyurethane heat-insulating bridges to bond two surfaces of aluminum profiles together into one, so as to achieve the purpose of environmental protection and energy conservation. Its functions, skills, costs, etc. are very ambitious. The following is a comparative analysis of casting and wear strip composite aluminum One. Basic function comparison (a) Intensity Polyurethane cast aluminum composite aluminum extrusion because of one-time extrusion, thus reducing the technical defects, plus a one-time polyurethane poured into the aluminum insulation tank, curing polyurethane insulation bridge, because of the high adhesion of polyurethane , Polyurethane heat insulation bridge and aluminum are completely integrated, no pressure, so the strength of aluminum is high. The strength of the polyurethane itself is relatively high, and the cross-sectional area of ​​the heat-insulating bridge is large, so the strength of the cast-in-place heat-insulating bridge is greater than that of a stringer. In this way, the overall strength of the cast composite aluminum profile is greater than that of the stringer type. The strip-shaped composite aluminum profile itself is formed through two extrusions. Afterwards, the insulation strip is put into the skill slot of two aluminum profiles and then rolled. As a result, the internal arrangement of the data has changed, and stress has caused the overall strength of the profile to be poor, and even significant cracking has occurred to make it waste. (b) Cross-sectional area of ​​profiles Polyurethane-casting composite aluminum profiles are compact and compact; the sliver-type composite aluminum profiles have a large cross-sectional area because of the need to open teeth and roll, and look bloated and enlarged. (iii) Profile export rate The same type of composite aluminum profiles with the same length, wear strip type compared with polyurethane casting, because the cross-sectional area of ​​the large bar, weight / meter than the cast type, so that its output rate is smaller than the cast aluminum composite Profiles [about 13%], making about 1 square meters of doors and windows consumes about 1 kilogram more. The use of cast insulated aluminum profiles made doors and windows, saving 25 yuan per square meter of aluminum cost. Assuming that a door and window factory makes 10,000 square meters of doors and windows each year, it can save 250,000 yuan. (iv) Plasticity (window) Nowadays, the doors and windows are varied, and the profiled doors and windows are constantly increasing. Making profiled doors and windows requires the plasticity of the profile to be better. Polyurethane cast compound aluminum profiles can be machined into doors and windows of any shape, including 360-degree arcs. Because the heat-insulating strip and the aluminum profile do not have a firm connection, the heat insulation strip easily escapes from the fitting groove of the aluminum profile when the aluminum profile is deformed, so that its window shape is limited. (v) Thermal insulation Polyurethane-casting compound aluminum profiles are satisfactory in long-term experiments and practices. In outdoor conditions of -20°C, the room still adheres to 18°C. When wearing a strip type outside -20?c, the room stays at 8?c. It can be seen that the pouring type is better than the strip-type heat insulation function. (6) Two-color table Some of the aluminum strips are made of extruded aluminum, and the aluminum profiles are treated with two separate surfaces, and then the two-color structure can be completed by opening the teeth, wearing the strip, and rolling. Pouring two-color composition skills: 1. Some aluminum profile surface treatment alone. 2. Make the necessary connection, pouring, and cutting of the aluminum profiles. Two. Profile cost comparison Aluminum is 20,000 yuan/ton, PVC insulation is 8,000 yuan/ton, PA66 insulation is 30,000 yuan/ton, and polyurethane casting rubber is 22,000 yuan/ton. The density of aluminum is 2.7g/cm?, the density of PVC is 1.4g/cm?, the density of PA66 is 1.3g/cm?, the density of polyurethane is 1.2g/cm?, and the width of the casting cavity is usually larger than the width of the cavity Small 0.8cm, the general wall thickness is 0.15cm, the center thickness is 0.12cm. Profile length is calculated as 600cm. 1. The cost of aluminum materials for each type of cast aluminum is more: Each saved aluminum weight: 0.8cm× (0.15+0.12+0.12+0.15)×600cm×2.7g/cm?=699.9g=0.7kg Each aluminum cost savings: 0.7kg × 20 yuan / kg = 14 yuan / root 2. The amount of wear is: Strip thickness is 0.2cm, strip width is 1.5cm, length is 600cm (1) The amount of PVC strips per aluminum: (0.2 × 1.5) × 2 × 600 × 1.4 g/cm × = 504 g = 0.5 kg Each aluminum profile PVC wear strip cost: 0.5kg × 8.00 yuan / kg = 4.00 yuan / root (2) Dosage amount of PA66 for each aluminum profile: (0.2 × 1.5) × 2 × 600 × 1.3 g/cm = 468g = 0.47 kg Each aluminum profile PA66 wear strip cost: 0.47kg × 30 yuan / kg = 14.1 yuan / root 3. The amount of polyurethane is: The amount of polyurethane per aluminum profile: 1.1cm × 0.8cm × 1.2g/cm × × 600cm / root = 633.6g = 0.6336kg / root Each aluminum polyurethane cost: 0.6336kg/root×22yuan/kg=13.94yuan/root 4. Savings for pouring aluminium profiles per PVC strip: 14 yuan/root—(13.94 yuan/root—4.00 yuan/root)=4.06 yuan/root 5 casting aluminum than nylon 66 wear strips each save: 14 yuan/root - (13.94 yuan/root - 14.1 yuan/root) = 14.20 yuan/root III. Analysis of equipment costs: 1. Wear a set of composite aluminum production lines for each set of quotes: (1) Domestic equipment: approximately 200,000 yuan - 500,000 yuan. (2) Imported equipment: Switzerland, Italy, etc., each quotation: about RMB 1.6 million. 2. Casting compound aluminum production line each set of quotes: (1) Domestic equipment: The quotation of “Shixing brand composite aluminum profile polyurethane casting machine” produced by Dalian Lianshi Science and Technology Co., Ltd. is RMB 250,000----32 million. (2) Imported equipment: Each set of equipment produced by American Yasong Company is priced at RMB 700,000 – RMB 1.4 million. Through comprehensive analysis above, it is enough to prove that the overall function of the cast aluminum insulation is better than the wear strip type. In fact, cast compound aluminum profiles are widely used in various countries in the world, and have been used in the United States for more than 40 years. Since 1975, the number of heat-insulating aluminum profiles produced using American Yasong casting techniques in North America alone has reached 1.95 billion meters or 142,396,415 tons. In the past two decades, some of the more prestigious constructions that were created or innovated in various countries of the world, some of Yasong’s pouring and insulation skills were used. In 1990, when the 100-storey Empire State Building in New York City celebrated its 60th birthday, it replaced all existing 6,500-inch steel windows with heat-insulating aluminum windows made from Yasong's pouring insulation and raw materials. “Asian Pine” has now become synonymous with “insulation and energy saving” for aluminum alloy doors and windows and curtain wall systems. In Japan, the low-interest loan door and window energy saving program led by the Japanese Ministry of Construction Industry has designated the use of pouring thermal insulation skills. Therefore, in South Korea and Japan, everyone can feel the presence of cast insulation skills at any time anywhere in the World Cup stadiums, news centers, foreign-related hotels and other affiliated facilities, as well as local residences, commercial construction, and so on. Enjoy the comfortable, healthy and charming green ecological space that is provided by the pouring insulation skill.