Flux explosion is suppressed and scattering of a solder ball or flux is decreased. By feeding equipment which used the low let processed in the shape of an edged tool, since [ of a thread solder diameter ] about 1/of cuts is made to 2 and a cut end is made to the flux heart, gas escapes from a cut-in feeder at the time of solder melt at the time of solder sending, and it decreases scattering and the solder ball of flux at it.