Aerosol cans, chemical cans, milk cans, beverage cans belong to the welding tank, the state of the product development of the relevant product standards. The principle of using a material to be welded by a certain amount of overlap of a pair of rotary welding wheel vertical pressure is applied, and the low voltage high current through the exchange, the contact resistance at a high temperature bonding material under the action of a large current in the material plastic melt state. The formation of solder joints under the effect of pressure on the upper and lower electrodes, welding current of each half wave to form a solder joint. Such material is welded in the welding roller rotating at a constant linear velocity acts to move, they form a mutual overlap points, or welds. Joints is proportional to the distance and speed of the welding wire, the welding current is inversely proportional to the frequency. Welded junction: the role of the current and the thermal effect of mechanical pressure, both of the metal sheet being welded one on the melting metallurgical junction (point), commonly known as the joints.
Miscellaneous cans --- (non-standard tanks, non-welded cans) such cans due to the structure, the size of each customer can be adjusted according to their own products, therefore, there is no relevant national standards.