WAVE SOLDER NOZZLE WITH AN EXIT TROUGH HAVING A WEIR, A SURFACE OF THE THROUGH BEING WETTABLE BY SOLDER; A WAVE SOLDERING MACHINE WITH SUCH NOZZLE; A METHOD OF IMPROVING THE FLOW OF SOLDER OUT OF A WAVE SOLDER NOZZLE

摘要

A wave solder nozzle (42) is capable of delivering solder material to performa wave soldering operation on a printed circuit board (18) in an inertatmosphere. The wave solder nozzle (42) includes a front plate (48) and a backplate (50) coupled to the front plate (48). The front plate (48) and the backplate (50) define a channel (52) through which solder material (54) flows. Thenozzle (42) further includes an exit trough (58) extending from the back plate(52). The exit trough (58) has a weir (60) provided at one end of the exittrough (58). The exit trough (58) is constructed and arranged to control theflow of solder material (54) from the wave solder nozzle (42). A surface ofthe exit trough (60) is wettable to improve the flow of solder material (54)out of the wave solder nozzle (42). A method of improving the flow of soldermaterial (52) through the nozzle (42) is also disclosed.