Why should the back of the aluminium plate of the aluminium curtain wall be reinforced?

Why should the back of the aluminium plate of the aluminium curtain wall be reinforced?

Why should the back of the aluminium plate of the aluminium curtain wall be reinforced, is in the case of external positive and negative pressure, the aluminium plate will not dent, two will not bulge out, so as to avoid the vibration of the aluminium curtain wall repeatedly inside and outside vibration and vibration sound. If sound insulation and heat preservation are required, rock wool, slag wool or foam treatment can be placed on the inside of the aluminium panel.

Curtain wall aluminium surface treatment, can be divided into two methods, one is anodic oxidation, the other is electrostatic spraying. Anodic oxidation of the oxide film is generally more than 12μ, the colour is only bronze and white two, monotonous colour, more serious shortcomings is that each piece of aluminium plate surface of different shades of colour, many pieces of curtain wall plate combined together to form a curtain wall overall effect is very difficult to see. This shortcoming can be said to be impossible to eliminate, not the production technology caused, but because the aluminium plate is not by a batch of number, chemical composition, are small differences, coupled with oxidation when the electrolytic bath liquid current density and other factors can not be exactly the same, so the oxidation of the colour more or less have differences, a single look may not be obvious, if they are lined up together that is very obvious. So the aluminium surface treatment of the aluminium curtain wall, must not use anodic oxidation.

Curtain wall aluminum surface treatment of another method is electrostatic spraying. Spraying is also divided into powder spraying and liquid spraying. Powder spraying material is mainly: polyurethane, poly expansion resin, epoxy resin and other raw materials with high colour pigment, can get dozens of different colours of the spraying powder foam. The spray foam is resistant to bumps and abrasion, and the aluminium sheet is deformed under a 50 kg impact, with no cracks in the spray layer, no loss of layer and no damage, and resistant to diluted acids and mortars. The only drawback is that it is resistant to long-term UV light and is prone to colour differences between the yin and yang surfaces after a few years.