Nozzle for shielded arc welding gun

A nozzle for a welding gun for shielded arc welding, said nozzle having an axis and axially opposite inlet and outlet ends, a tubular cooling fluid jacket extending from said inlet end toward said outlet end coaxial with said axis and having axially outer and inner jacket ends, said jacket having an inner surface, a cooling core in said jacket having surface means providing a cooling fluid passageway with said inner surface, said passageway having an inlet portion extending from said outer jacket end toward said inner jacket end, an outlet portion extending from said inner jacket end toward said outer jacket end and a connecting portion at said inner end of said jacket for communicating said inlet and outlet portions, a tubular gas shroud extending from said outlet end toward said inlet end coaxial with said axis and having axially outer and inner shroud ends, a tubular gas diffuser in said shroud and coaxial therewith, a sleeve of heat transferring plastic material interposed between said diffuser and said shroud and extending from said inner end of said shroud toward said outer end thereof, said diffuser supporting a welding electrode contact tip adjacent said outer end of said shroud, said cooling core having an inner end extending axially inwardly beyond said inner jacket end, and a heat sink and insulating section axially overlying said inner ends of said jacket and said core.

A nozzle for a welding gun for shielded arc welding, said nozzle having an axis and axially opposite inlet and outlet ends, a tubular cooling fluid jacket extending from said inlet end toward said outlet end coaxial with said axis and having axially outer and inner jacket ends, said jacket having an inner surface, a cooling core in said jacket having surface means providing a cooling fluid passageway with said inner surface, said passageway having an inlet portion extending from said outer jacket end toward said inner jacket end, an outlet portion extending from said inner jacket end toward said outer jacket end and a connecting portion at said inner end of said jacket for communicating said inlet and outlet portions, a tubular gas shroud extending from said outlet end toward said inlet end coaxial with said axis and having axially outer and inner shroud ends, a tubular gas diffuser in said shroud and coaxial therewith, a sleeve of heat transferring plastic material interposed between said diffuser and said shroud and extending from said inner end of said shroud toward said outer end thereof, said diffuser supporting a welding electrode contact tip adjacent said outer end of said shroud, said cooling core having an inner end extending axially inwardly beyond said inner jacket end, and a heat sink and insulating section axially overlying said inner ends of said jacket and said core, said diffuser and said sleeve of plastic material are threadedly interengaged for promoting the transfer of heat from said shroud to said diffuser.

A nozzle for a welding gun for shielded arc welding, said nozzle having an axis and axially spaced apart inlet and outlet ends and comprising a cooling fluid section at said inlet end coaxial with said axis and having an inner end spaced from said inlet end toward said outlet end, and a terminal end axially spaced from said inner end toward said outlet end, a gas nozzle assembly at said outlet end coaxial with said axis and having an inner end axially spaced from said outlet end and interconnected with said terminal end of said cooling fluid section, said inner end of said gas nozzle assembly being axially spaced from said inner end of said cooling fluid section, said cooling fluid section and gas nozzle assembly including a shielding gas and electrode passage extending from said inlet end to said outlet end, said gas nozzle assembly including an electrode contact tip having an electrode opening therethrough coaxial with said axis, said passage including an outlet portion surrounding said tip, said cooling fluid section including a cooling fluid jacket, core means providing an axially extending cooling fluid passageway in said jacket having an inlet portion extending from said inlet end to said inner end of said cooling fluid section and an outlet portion extending from said inner end of said cooling fluid section to said inlet end, means for communicating said inlet and outlet portions at said inner end of said cooling fluid section, and a heat sink and insulating section across said inner end of said cooling fluid section and said inner end of said gas nozzle assembly.