| 摘要 |
A nozzle cap (42), adapted for use with an adhesive dispensing device which includes a gun body (12) and a nozzle (14) having an adhesive passageway (76) and an air passageway (110), comprising a nozzle mounting portion or nut (44) permanently mounted to a nozzle plate (46) formed with a stepped throughbore (72) having an inlet (74) with a seat which mounts an O-ring (80) and a plurality of spaced air jet bores (90) located radially outwardly from the throughbore (72) and O-ring (80). Both the nut (44) and nozzle plate (46) are machined separately, and then are substantially permanently interconnected by roll-forming an end of the nut onto the peripheral edge of the nozzle plate. When the nut portion (44) of the nozzle cap is assembled on the nozzle (14) of the adhesive dispensing device, the nozzle plate (46) is positioned such that its stepped throughbore (72) communicates with the adhesive passageway in the nozzle and its air jet bores (90) communicate with the air passageway in the nozzle. An adhesive bead is extruded through the stepped throughbore in the nozzle plate, and this bead is impacted by air jets from the spaced air jet bores which stretch or attenuate the adhesive bead to form an elongated adhesive fiber for deposition in a controlled spiral spray pattern onto a substrate. |
