Extrusions
The term extrusion is usually applied to both the process, and the product obtained, when a hot cylindrical billet of aluminum is pushed through a shaped die. The resulting section can be used in long lengths or cut into short parts for use in structures, vehicles or components. Also, extrusions are used for the starting stock for drawn rod, cold extruded and forged products. While the majority of the many hundreds of extrusion presses used throughout the world are covered by the simple description given above it should be noted that some presses accommodate rectangular shaped billets for the purpose of producing extrusions with wide section sizes. Other presses are designed to push the die into the billet. This latter modification is usually termed “indirect” extrusion.
Extrusion Process
Our modern Extrusion press is based on continuous heating process for homogenous extrusion. The logs are fed into Hot Log Shear where they are continuously heated to desired temperature and cut in to billets as required. The billets are placed in a container (a heated chamber), in which billets are pushed under hydraulic pressure through Ram by the stem, this force squeezes the Aluminium alloy material forcing it to pass through a shaped Die made of Die Steel (special steel alloy).
Extrusion Equipment
- 1850 MT with 7” Container
- 950 MT with 5” Container
- Single Billet Heater with Hot Log Shear
- 2 Chamber Die Heater, with linear controlled Pullers
- Belt Conveyer Extrusion Handling systems
- Extrusion Quench System
- Undercut Saw for Final Cut
- Ageing Furnace
Extrusion Profile Specification
- Extrusion Circumscribing Circle Diameter Solid profile : 145 mm / Hollow profile: 130 mm
- Cross Sectional Area for 6063 Alloy : 2300mm ²
- Cross Sectional Area for 6082 Alloy : 1500 mm ²
- Extrusion Cut Length Offered : 1500mm to 8000mm Note: Cut lengths smaller than 1500mm will be considered on special request.
Billet Casting Equipment
SSAIL is equipped with a large scale 8 MT (metric ton) capacity melting furnace, with an ability to perform 4 charges in a 24hr period. Catering to our multiple billet diameter requirements, we have a net capacity of 20 billets per charge for 7” diameter and 40 logs per charge for 5”diameter
SSAIL uses Regenerative Melting Furnace using Hot Top Casting with inset Graphite Ring . SSAIL uses virgin Aluminum ingots purchased from selective primary metal producers and in-house generated scrap while manufacturing Aluminium alloy billets.SSAIL ensures that standard billet casting procedures are followed in furnace operations, pertaining to grain-refining, using ceramic foam filters, flow controls are made through hydraulic table. During billet casting strict quality measures are taken, samples are constantly monitored for alloy composition using automated spectrometer. Each batch is numbered based on the ISO quality and tracking documentation.
Regular alloys produced are shown below, the same can be found in our extrusion catalog.
Aluminium Alloys We Cast
