Ways of colouring of windows from aluminium
There are two basic technologies of colouring of an aluminium profile:
- covering drawing by galvanic way;
- drawing of a paint and varnish covering.
Both these are widely applied of a way at colouring of a profile and, as a rule, manufacturers use both that and another.
The Galvanic way allows to receive strong, proof to the atmospheric phenomena, the covering which does not demand the big floor spaces, but such manufacture is harmful. Besides elektroliticheskih baths, the line of automatic loading-unloading, a line of preparation of a profile is required. The equipment expensive, but the covering cost price turns out less, than at paint and varnish.
One of lacks of this way is the limited colour scale.
On colour scale the way of drawing of paint and varnish coverings, namely a way of a powder covering which does not demand some toxic solvents has the Big possibilities and is not harmful manufacture. The paint represents a dry powder of different colours. The aluminium profile is preliminary prepared (degreasing and clearing), then is located in the chamber in which the electric potential is given to a product. After that, in the special chamber, the dry toner is put by a dispersion method on a surface and a profile is located in a heat chamber, in which at temperature approximately 200 0С a covering polimerizuetsja, forming a strong elastic covering with high adhesion.
The colour scale powder a covering includes all colours under catalogue RAL. The special automated line is necessary For covering drawing by powder way.
The Way of drawing of paint and varnish coverings by means of liquid paints on the basis of solvents in manufacture of aluminium profiles for windows and doors meets extremely seldom, we will not stop therefore on it.
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