| 摘要 |
A welding gun for electric arc-welding by means of a continuously fed solid metal electrode or a tube wire filled with powder and comprising a sleeve with an inlet opening guiding the electrode, a means driving the electrode, a welding mouthpiece or a welding burner, means feeding protective gases through a gas nozzle, and optionally means (5, 6) cooling the gas nozzle. The gas nozzle is a copper point (12) cast in a body of plastics. The plastic body comprises two substantially concentric tubes interconnected through longitudinal connecting pieces (13), said copper point being cast in the connecting pieces. In this manner a welding mouthpiece is obtained which is less expensive to manufacture than previously known. An additional advantage of this welding mouthpiece is that it can be touched as it is not so hot. In addition it is of a low weight and completely tight due to the casting. Furthermore the mouthpiece need not be insulated. |
