APPLYING COATING COMPOSITIONS TO SUBSTRATES

摘要

The invention provides apparatus (10) for spraying a coating composition onto a substrate comprising means for forming a curtain of the coating composition and means for atomising the formed curtain. The curtain of coating composition is formed by allowing it to flow over a transfer surface (14, 43, 53). Preferably the transfer surface (43) has upstand portions (44) thereon, to ensure that the coating composition flows over the transfer surface (43) in a uniform manner. Alternatively, the transfer surface (53) is convex. The curtain of the coating composition is atomised using an air knife which preferably follow a fan-shaped or diverging path before it contacts the curtain of coating composition, so that the stream of air supplied is evenly distributed across the whole width of the curtain.