Aluminum is one of the most used metals in today’s society – Aluminium Extrusions Australia in Pretoria it can be found across a number of industries, such as construction and commercial, and in a number of applications, such as beverage cans and appliances. When choosing a manufacturer of aluminium extrusion for supplying the metal that you use in your workplace, however, it is important that you carefully consider which one will be best for your needs.
The manufacturer will begin by removing the aluminium from deep within the earth’s crust (either as bauxite ore or feldspar). Often, the Bayer’s method, Wohler’s method or Hall Heroult method is chosen to remove the metal in its molten form. It is then hardened and moulded into whatever shape the manufacturer desires. When the aluminium is extracted from the earth in its solid form, Where To Buy Aluminum Extrusion it will be passed through a number of mechanical processes that are designed to give the metal its desired shape. These processes include: rolling, drawing, forging, spinning, piercing and extrusion.
Regardless of whether aluminium has been found in its molten or solid form, the manufacturer will then pass it through either a hot working or cold working process to prepare it for their customers. When using the hot working process (the most popular of the two), a billet will be heated to a temperature of over 79 degrees Celsius, which will allow the aluminium to be easily distorted and placed into its desired shape.
The reason for the popularity of the hot working process over the cold working one can be fully realized when you compare aluminium extrusion to squeezing toothpaste out of its tube. It is much easier to extrude the metal when it is malleable, meaning that it must have been heated to a certain temperature.
Finally, the aluminium will pass through an extrusion and drawing process that runs almost parallel to each other. This is the final step in the whole extrusion process and is the step that gives the metal its entire shape. Deep drawing, for example, is used give the metal a cup, conical tapered, cylinder and seamless tube shape. For less curved shapes, Aluminum Glass Frame Extrusion the drawing process is skipped.
Once you are satisfied with the processes and methods utilized by a potential manufacturer of aluminium extrusions, you can begin submitting your orders with them. If, after your first delivery, you are still satisfied with the manufacturer based on the promptness of the order being filled and the quality of the aluminium that you receive, you can continue the relationship.
Aluminium Extrusions Australia in Pretoria?
Aluminum Sliding doors are stackable doors of many panels that move entirely to one side stacked neatly together. Their earliest form can be seen in traditional Japanese architecture. Now they are a definite feature of most public spaces like malls, hospitals etc. They are manufactured with a sophisticated track and frame system with a superior sliding mechanism. They offer an energetic look to any property and helps to maximize the light in the room and achieving the full potential of the view. They are a feasible alternative to bi-folding doors, with a sash width going up to 120 cms.
What are the advantages of automatic aluminum sliding frame doors
· Disabled friendly - These automatic doors open and close on their own.
· Safety features - they have up to date safety features and wireless remote control as well. Timers allow security personnel to lock the doors without having to be present near them.
· Gives Footfall account - the number of times the door opens can be obtained. This is useful footfall information in malls or shops.
· Style and variety. These doors are available in aluminum, which can be painted to depict the company's logo etc. in an office. The latest frameless glass doors are very popular among offices, where they allow an uninterrupted view of the proceedings outside.
· They allow for heat or coolness retention since they open only when somebody approaches the door
What are the parts of an automatic aluminum sliding door
An automatic sliding door normally consists of the following parts
· Carrier wheels
· Sliding door panel(s)
· Sidelite panel(s)
· Lock and activation/ safety setup
The door panels are made from extruded aluminum profiles and safety glass for visibility.
Applications of automatic sliding aluminum doors
· Higher the traffic through the doors, heavier will be the moving panel.
Good for offices, hospitals, malls, banks, restaurants, art galleries etc.
· Fire and smoke door applications
· Energy conservation
· Security control, directional control or card access control applications
Testing procedures - The doors are made to open and close automatically for forty eight hours at a stretch.
How are they assembled?
· When they are shipped, the instructions for installation accompany them.
· The instructions are to be read fully
· Two or more people are required to install it
· Be careful when handling the glass
· Operate power tools carefully according to manufacturer's instructions
What is weatherstripping?
Weatherstripping is sealing the sliding panels from the elements of the weather by an insulation strip. This has to be replaced when it gets worn out.
What are the things to watch out for in automatic sliding doors
· Installation is not easy - the tracks have to be perfectly aligned, and more than one person is required to install a sliding door.
· The track attracts dirt because it is a series of grooves in which dirt accumulates very fast
· The doors get jammed sometimes because of the rust and dirt of the metal parts. They have to be changed in this case. Regular oiling helps too.
· If there is a power cut, they will get jammed and they have to be forced open.
Automatic Sliding Aluminum Doors
High strength aluminium alloys.
The origin of aluminium alloys in aircraft construction started with the first practical all-metal aircraft in 1915 made by Junkers in Germany, of materials said to be `iron and steel'. Steel presented the advantages of a high modulus of elasticity, high proof stress and high tensile strength. Unfortunately these were accompanied by a high specific gravity, almost three times that of the aluminium alloys and about ten times that of plywood. Aircraft designers during the 1930s were therefore forced to use steel in its thinnest forms. To ensure stability against buckling of the thin plate, intricate shapes for spar sections were devised.
In 1909 Alfred Wilm, in Germany, accidentally discovered that an aluminium alloy containing 3.5 per cent copper, 0.5 per cent magnesium and silicon and iron, as unintended impurities, spontaneously hardened after quenching from about 480°C. The patent rights of this material were acquired by Durener Metallwerke who marketed the alloy under the name Duralumin. For half a century this alloy has been used in the wrought heat-treated, naturally aged condition. The improvements in these properties produced by artificial ageing at a raised temperature of, for example, 175°C, were not exploited in the aircraft industry until about 1934.
In addition to the development of duralumin (first used as a main structural material by Junkers in 1917) three other causes contributed to the replacement of steel by aluminium alloys. These were a better understanding of the process of heat treatment, the introduction of extrusions in a wide range of sections and the use of pure aluminium cladding to provide greater resistance to corrosion. By 1938, three groups of aluminium alloys dominated the field of aircraft construction and, in fact, they retain their importance to the present day. The groups are separated by virtue of their chemical composition, to which they owe their capacity for strengthening under heat treatment.
The first group is contained under the general name duralumin having a typical composition of: 4 per cent copper, 0.5 per cent magnesium, 0.5 per cent manganese, 0.3 per cent silicon, 0.2 per cent iron, with the remainder aluminium. The naturally aged version was covered by Air Ministry Specification DTD 18 issued in 1924, while artificially aged duralumin came under Specification DTD 111 in 1929. DTD 111 provided for slight reductions in 0.1 per cent proof stress and tensile strength.
The second group of aluminium alloys differs from duralumin chiefly by the introduction of 1 to 2 per cent of nickel, a high content of magnesium and possible variations in the amounts of copper, silicon and iron. `Y' alloy, the oldest member of the group, has a typical composition of. 4 per cent copper, 2 per cent nickel, 1.5 cent magnesium, the remainder being aluminium and was covered by Specification DTD 58A issued in 1927. Its most important property was its retention of strength at high temperatures, which meant that it was a particularly suitable material for aero engine pistons. Its use in airframe construction has been of a limited nature only. Research by Rolls-Royce and development by High Duty Alloys Ltd produced the `RR' series of alloys. Based on Y alloy, the RR alloys had some of the nickel replaced by iron and the copper reduced. One of the earliest of these alloys, RR56 had approximately half of the 2 per cent nickel replaced by iron, the copper content reduced from 4 to 2 per cent, and was used for forgings and extrusions in aero engines and airframes.
The third and latest group depends upon the inclusion of zinc and magnesium and their high strength. Covered by Specification DTD 363 issued in 1937, these alloys had a nominal composition: 2.5 per cent copper, 5 per cent zinc, 3 per cent magnesium and up to 1 per cent nickel. In modern versions of this alloy nickel has been eliminated and provision made for the addition of chromium and further amounts of manganese.
Aircraft structural aluminium.
Of the three basic structural materials, namely wood, steel and aluminium alloy, only wood is no longer of significance except in laminates for non-structural bulkheads, floorings and furnishings. Most modern aircraft still rely on modified forms of the high strength aerospace aluminium alloys which were introduced during the early part of the 20th century. Steels are used where high strength, high stiffness and wear resistance are required. Other materials, such as titanium and fibre-reinforced composites first used about 1950, are finding expanding uses in airframe construction.