FACILITIES > ALUMINIUM EXTRUSION
 
 
Extrusion Process
  • Extrusion is a process which occurs when a preheated homogenized aluminum billet is forced through shaped orifices in hardened dies by means of high longitudinal pressure.
  • Dies are heated and loaded into press. The appropriate size billet is preheated to specifications and introduced into the press. The billet is forced through the die opening by means of a ram to obtain the desired hollow or solid profile. The pressure and the frictional forces acting on the billet cause it to reach temperature in excess of 500°C.As extrusion exit the press it is cooled at a specific rate to ensure quality finish.
  • The extrusion is drawn down in run out table by means of a puller and is transferred to the cooling table where it is allowed to cool prior to stretching.          
  • The extrusion is cut to desired length and placed in baskets in such a way as to allow good air flow around during ageing process to obtain desired mechanical properties.
  • Rigid controls are maintained to ensure that temperature are within specified parameter throughout the extrusion process ensuring a high quality metal and consistent finish. Tolerances on profiles are regularly checked and recorded.
 
 
Extrusion dimensions tolerance standards
  • BS EN 12020-2:2008
  • Aluminium and aluminium alloys. Extruded precision profiles in alloys EN AW-6060 and EN AW-6063. Tolerances on dimensions and form .
  •  BS EN 12020-2:2008 Aluminium and aluminium alloys. Extruded precision profiles in alloys EN AW-6060 and EN AW-6063. Tolerances on dimensions and form
  • BS EN 12020-2 is the European standard that specifies tolerances on dimensions and form of extruded precision profiles, in alloys EN AW-6060 and EN AW-6063 manufactured with and without a thermal barrier. It applies to extruded products supplied without further surface treatment. Precision profiles covered in this standard are distinguished from extruded profiles for general applications covered in BS EN 755-9 by the following characteristics:
  • • They are mainly for architectural applications
    • They meet more stringent requirements regarding the surface condition of visible surfaces
    • The maximum diameter of the circumscribing circle CD is 200 mm
    • They are made to closer tolerances on dimensions and form.
 
 
Contact Us
Qatar Aluminium Extrusion Company 
P.O Box 201698,  
New Industrial area Street No 16,  
Plot No 8101 & 8102, Pink Zone, Qatar.  

Tel: +974 44 333 555/540 
Fax: +974 44 333 500
Email : info@qalex.com.qa
 
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