Fixed inner spray nozzle to supply gas and powder mixture, for painting surfaces, has sleeve and insert, formed so that outer contour of insert forms Laval nozzle with inner contour of sleeve

摘要

The nozzle (1) comprises a sleeve (2) and an insert (3), which are formed so that the outer contour of the insert forms a Laval nozzle (4) with the inner contour of the sleeve. The Laval nozzle has an annular entry channel (5) to supply the powder and gas mixture and an exit channel (6) to spray a powder and gas mixture and extends over the entire casing inner surface (16) of the nozzle.