The principle of seamless welding is gas shielded welding, short for gas shielded welding or gas shielded welding. It uses arc as heat source and gas as shielding medium to melt welding. During the welding process, the protective gas layer is formed around the arc, which isolates the arc from the molten pool, prevents the influence of harmful gas and ensures the stable combustion of the arc. Gas shielded welding is classified according to electrode status, operation mode, type of shielding gas, electrical performance, polarity and application range.
Seamless welding
Seamless welding depends on the specific situation. Gas shielded welding can be used with different gases. The commonly used shielding gases are carbon dioxide, argon, helium, hydrogen and gas mixture. The advantages of gas shielded arc welding are: good linear arc, easy centering, all-position welding and automatic welding; small arc concentration heat, small welding pool, fast welding speed, narrow heat affected zone, small deformation of welding parts, strong crack resistance and good welding quality. The disadvantage is that it is not suitable for multi-wind field welding, and the arc radiation is strong.


Seamless welding technology, welding device is a power supply converter that converts 50/60Hz current into 20KHz or 40KHz power supply through transistor function device. Welding head is mechanical vibration energy, which can be directly transmitted to products needing pressing acoustic devices. Vibration melts plastics by vibrating friction between the welded workpiece and the bonding surface, but its welding strength is close to that of an adhesive material.


Seamless welding technology not only helps to eliminate die welding, but also improves the accuracy, smoothness and appearance of parts. At the same time, seamless welding technology is effectively controlled in the process of injection moulding to shorten the processing cycle of the mould. Because the products produced by this method have excellent surface finish, secondary plating and annealing are not needed to avoid the size change caused by secondary shrinkage.