METHOD OF FRITTING AND POLYMERIZATION IN THE FURNACE OF THE POWDER COATINGS Russian patent published in 2006 - IPC C23C26/00 C23C26/02 F27B9/06 

FIELD: many branches of industry; methods of fritting and polymerization in the furnace of the powder coatings.

SUBSTANCE: the invention is pertaining to the method of heating and fritting of the polymeric powder coatings applied on articles and may be used in many branches of industry for painting articles of the various configurations. The method includes: charging by batches of the articles in the furnace, heating with realization of polymerization of their powdery coatings and refrigeration. Before the heating operation in the working space of the furnace create rarefaction by means of preliminary switching on the ventilation and circulation system. After the heating up to the preset temperature conduct the periodical switching-on / switching-off of the electric heater of the furnace. At that the blowout of the air from the furnace is conducted. For keeping the preset temperature over the whole operational volume of the furnace through at least one pilot hole in the furnace the portions of the cold air are periodically pumped in. Then conduct refrigeration, at which the electric heater is finally switched off, and the air saturated with the products of polymerization is removed from the furnace, create the rarefaction and feed the new batch of the cold air into the furnace. For realization of the heating they use the electric heater made out of the steel sheets and the square-shaped metallic tubes. The tubes have holes used for arrangement in them of the tubular rods supporting the spirals. The tubular rods supporting the spirals of the electric heater are made out of the mullitesiliceous ceramics. The technical result of the invention is improvement of the quality of the articles treated in the furnace with simultaneous improvement of the process of heating of the furnace, the air ventilation and circulation.

EFFECT: the invention ensures improvement of the quality of the articles treated in the furnace at simultaneous improvement of the process of heating of the furnace, the air ventilation and circulation.

8 cl, 3 dwg, 1 ex