Windows and doors
made of aluminium
, light alloys or PVC
, are closing systems whose main function is to define space according to architectural needs.
The aluminium, light alloy or PVC
windows and doors find applications
in building and construction, road, sea and air transport. From train windows to the windows of our own home, portholes of ships and aircraft, windows have been manufactured with widely differing techniques already way back in history.
According to a technical classification they are subdivided into three macro classes:
Light alloy or PVC windows and doors can represent a simple closing or part of the building structure, or else they can complete the function of certain architectural solutions. Hence they can be divided into:
The window is a system separating the interior environments from the outside. It is fabricated by cutting and assembling aluminium profiles
or PVC profiles
and a cladding panel is attached mechanically to the frame. The cladding can be made of various materials, such as: glass, wood, composite materials (pvc-metal; metal-wood; wood-pvc).
The curtain wall substitutes either part or the whole of the exterior masonry walling. The structure is anchored directly to the columns and slabs of the building. It is designed to withstand both horizontal and vertical stresses.
The most popular technique for fabricating curtain walls
is the modular technique. Hence the curtain wall consists of modules of varying size, which are fitted to clad the building. Curtain walls can be classified into:
traditional (very rugged but not very flexible)
structural: where the cladding panels are glued directly to metal frames (resulting in a remarkable effect of continuity)
suspended where the cladding panels are attached to steel stay cables supporting the curtain wall.
Curtain walls have achieved considerable technological targets. They allow construction of anti-seismic buildings with high degree of thermal and acoustic insulation in relatively short times at reasonable and competitive costs.
On the other hand the accessory products are products architecturally complementary to windows and doors, namely: shutters, handrails and gates, sunbreakers, partitions.
Metal windows and doors represent one of the main cost items in the building process: in fact they are used for both the domestic market (commercial and residential segment for small/medium scale projects) and the global market.
More than 90% of the windows and doors are manufactured with the use of aluminium alloy extruded sections. The window/door components are made to size and have to take into account the technical requirements of the project as well as the style. Hence there are no standard products apart from the interior doors for residential and commercial buildings for which technical designers adopt conventional measurements.
In fact window fabricators, building contractors and all those firms manufacturing aluminium or PVC components use state-of-the-art aluminium working machines
such as machining centres and cutting-off machines
equipped with special software
designed to optimise the production cycle in terms of both quantity and quality.
Manufacturing process for aluminium, light alloy and pvc windows:
management of agents - franchising - direct sales - promotion - public relations
analysis of requirements - price/performance target - design and calculation - prototyping - laboratory testing - machinability tests - industrialization
heating of billets - extrusion - hardening - stretching - aging - packaging
analysis of requirements - price/performance target - design and calculation - prototyping - testing - industrialization
cleaning - coating/anodization - drying - packaging
cutting - drilling - joining of profiles - inserting of glazing - packaging
loading/unloading - installation of outer frames - hoisting - installation