Patent ID: 7950568
Filing Date: 2011-05-31
Classification: B22C,B23K

Abstract:
1. An exothermic welding assembly, comprising: a mold formed of a material which withstands exothermic welding temperatures and having an elongate axis, said mold comprising a first portion having a first cavity therein for positioning at least two members adjacent each other which are to be exothermically welded together, and a second portion comprising a mold cover having a top side and at least one side extending at a substantial angle to said top side; a second cavity in said mold for containing a weld metal, said second cavity communicating with said first cavity and having a first vent passage extending therefrom to the exterior of said mold to vent gases from said second cavity; a depression in said mold cover for containing a starting material for the initiation of the reaction of the weld metal, said depression in said mold cover opening to said top side of said mold cover, and a second passage between said depression and said second cavity in the mold to communicate the starting material when ignited with the weld metal in said second cavity; and a third passage associated with said mold cover and extending at a substantial angle from said one side of said mold cover toward said elongate axis of the mold such that said third passage intersects said depression, wherein a combination of said third passage and said depression extends across at least a substantial portion of width of said mold cover.