Aerosol cans, chemical cans, milk powder cans, and beverage cans are all welded cans, and the state has formulated relevant product standards for the products. The principle used is that the material to be welded is pressed by a pair of rotating upper and lower welding wheels with a certain amount of overlap, and through the AC low-voltage and high-current, the contact resistance of the material overlap generates a high temperature under the action of the high current, so that the material is in a high temperature. molten state. A solder joint is formed under the action of the upper and lower electrode pressure, and each half wave of the welding current forms a solder joint. In this way, the welded material moves at a certain linear speed under the action of the rotary welding roller to form overlapping points, that is, the welding seam. The welding point distance is proportional to the welding line speed and inversely proportional to the frequency of the welding current. Welding: Under the action of the thermal effect of the current and the mechanical pressure, the fusion junction area (point) where the two metal sheets to be welded are integrated in the metallographic phase, commonly known as the solder joint.
iron box
Iron box (2 pieces)
Miscellaneous cans---(non-standard cans, non-welded cans) Due to the structure and size of such iron cans, each customer can adjust according to their own products, so there is no relevant national standard.