Laser spray gun that can be used to produce an ultra-high bond strength coating

摘要

Laser spray gun with which a coating with ultra-high bond strength can be produced, characterized in that it consists of a condenser lens 9, a secondary air filter 8, a primary air heating filter 1, a through pipe nut 3, an outer cover 2, an air collection cap 4, an air spray nozzle 6, a drive gas inlet 5 and a powder feed nozzle 7, the secondary air filter 8 having the shape of a cylinder which is not closed at both ends, and the central portion of the cylinder is provided with densely arranged radial through holes, the condenser lens 9 being arranged in the cavity chamber of the secondary air filter 8 , wherein the primary air heating filter (1) is an O-ring structure and the inside of the O-ring is connected to the outside of the secondary air filter 8 by threads, the O-ring section is a central hollowed-out structure and an electric heating wire is provided in the hollowed-out structure n is, the heating temperature of which is 80 ° C to 120 ° C to keep air dry, with the through pipe nut 3 located between the outer cover 2 and the secondary air filter 8, providing a firm support for the air collection cap (4) and at the same time via a sealing groove and a sealing ring connected to the outer cover 2 and threadedly connected to the secondary air filter 8, the through pipe nut 3 having a plurality of through holes along the axial direction, the central cavity of the air collection cap 4 being a conical through hole structure with an end face of larger diameter in is in close contact with the through pipe nut 3 and has a gap to the outside of the secondary air filter 8, while a smaller diameter side end surface cooperates with the air injection nozzle 6 to form a nozzle, the air injection nozzle 6 being attached to one end of the outer cover 2, the Inside of the air spr itzdüse 6 is an inner chamber, while the air spray nozzle 6 and the side end face of smaller diameter of the air collecting cap 4 enclose an outer chamber, and the gap between the air spray nozzle 6 and the neck, i.e. the end face of the smallest diameter of the air collecting cap 4 between 0.5 mm and 2 mm is held in order to generate a gap jet, the drive gas inlet 5 being arranged on the outside of the air injection nozzle 6, with the drive gas entering the outer chamber via the drive gas inlet and into the inner chamber through the gap between the air injection nozzle 6 and the air collection cap 4 is sprayed with the powder feed nozzle 7 upstream of the air collection cap 4 and in the vicinity of the neck, with powder entering through the powder feed nozzle into the conical cavity of the air collection cap.