Monthly Archives: April 2011

Aluminium windows profiles

Aluminum windows profiles

Aluminum doors and windows are common products in our daily lives, aluminum window and door profile is the basic material for aluminum alloy doors and windows, and it is the main body of aluminum doors and windows. Aluminum door and window specifications and size, accuracy class, chemical composition, mechanical properties  and the surface quality  will affect  the production quality , using properties and working life of aluminium windows and aluminium doors.

1, aluminum doors and windows profiles Size

The Size  of aluminum doors and windows profiles, mainly is the high profile cross-section size (used in the aluminum window frames, doors and windows ,called  the thickness of the door) , and constitutes a dimension. Aluminum window profiles, etc. There are 40,45,50,55,60,65,70,80,90,100 mm size series. The size of Aluminum windows is mall and  the size of aluminum door series is  relatively bigger size. Aluminum doors and windows can be the same series and that  does not mean that the section of aluminum door and window profiles have the same shape and size. The same series of aluminum doors and windows profiles, the cross-sectional shape and size are quite complex  and we need analysis and treat them according to the drawings and the shape. Aluminum window profile is divided into solid sections and hollow sections according to aluminium shape and the application of hollow section is wide. The thickness of aluminum door and window has a basic requirement, for aluminum windows of not less than 1.4mm, aluminum alloy doors not less than 2mm.

2.The chemical composition and mechanical function of aluminum doors and windows

Aluminum doors and windows profiles is AlMgSi aluminum alloy, its chemical composition including aluminum, silicon, iron, copper, magnesium, manganese, chromium, titanium, zinc alloy composition,  in which magnesium share 0.45-0.90%, silicon share 0.2-0.6%. The mechanical properties of aluminum window and door profiles: бb tensile strength is not less than 157N/mm2; specified elongation stress бp0.2 is not less than 108N/mm2; elongation rate is not less than 8%; hardness is not less than 58 HV.

3. The production of aluminum profile and aluminum window and door profile, need four processes as the following: ingot casting, extrusion process, heat treatment and surface treatment.

(A) ingot casting

The process includes the ingredients, melting, casting, homogenizing. This is the main process for the certain chemical composition and dimensions of the ingot.  

(B) Extrusion

Extrusion includes ingot heated, extrusion, cooling, tension straightening, cutting and other processes constitute an automatic production line. Production line equipment, including induction furnace, extrusion press, run out table the conveyer, lifting device, cooling bed, tension straightening machine, the stored material table, drawing machine, sawing machine and so on. The ingot heating temperature will be controlled at 400 ℃ ~ 520 ℃, the too high or too low temperature will have a direct affect extrusion. Extruder generally is use single-action hydraulic press, the tonnage of 800 tons to 2500 tons.

(C)Heat treatment

AlMgSi aluminium alloy for window and door profile is a strengthened alloy. Quenching and aging by different systems to get the mechanical properties of profiles. Aluminium profiles Supplied for aluminum windows and aluminium doors is RCS state, that is, high temperature heat treatment and rapid cooling after molding and artificial aging.

(D) Surface treatment

The surface treatment of aluminum window and door profile, the most is anodizing, electrophoresis, powder coated and fluorocarbon paint, , so that the surface can be different colors and good appearance. The surface treatment can enhance the aesthetic appearance of profiles, and also extend the service life of aluminum window and door profile.

Aluminum doors and windows are common products in our daily lives,  aluminum window and door profile is the basic material for aluminum alloy doors and windows, and it is the main body of aluminum doors and windows . Aluminum door and window specifications and size, accuracy class, chemical composition, mechanical properties  and the surface quality  will affect  the production quality , using properties and working life of aluminium windows and aluminium doors.