As a common metal packaging product, iron cans have various structures and processing categories, which leads to many people not knowing enough about their structure. According to the structure and processing method of iron cans, iron cans are generally divided into two-piece iron cans, three-piece iron cans and aerosol iron cans. These different types of iron cans can be stamped into various shapes, such as round iron cans, square iron cans, and other special-shaped iron cans.