Continuous hot melt adhesive applicator

摘要

A hot melt applicator particularly adapted to apply a continuous coating of hot melt adhesive to a substrate includes a plurality of dispensing nozzles connected directly to an adhesive manifold having passages for directing molten hot melt adhesive to each of the dispensing nozzles. A plurality of needle valves corresponding in number to the dispensing nozzles are also connected to the adhesive manifold for allowing individual control of the adhesive flowing to each nozzle. The applicator further includes an air manifold for supplying pressurized air to each of the dispensing nozzles and for causing the adhesive to be discharged from some or all of the nozzles in a swirling pattern. At least one adhesive supply valve is mounted to the adhesive manifold for controlling the supply of adhesive to the passages in the adhesive manifold and ultimately to the nozzles. A cleaning fluid control valve is also mounted to the adhesive manifold for controlling the supply of cleaning fluid through the passages in the adhesive manifold and the nozzles.