... powder, grounding electrode, GEM and so on. Jsbound graphite exothermic weld mold are dedicated to producing one type of connection.Exothermic ... the starting powder sets off an exothermic reaction in the weld powder, reducing it to molten copper alloy. This instantaneously melts ... retaining disc, and flows down the tap hole, to the weld cavity, where it partially melts the conductors, before cooling to ...