Three-piece cans and Two-piece cans

Metal cans are classified according to the manufacturing method; 

there are mainly three-piece cans and two-piece cans:

(1) Three-piece cans  

The application history of three-piece cans has been nearly 200 years. Although it has been improved many times, its basic composition is still made of three metal sheets (mostly tinplate) of the can body, bottom and lid, hence the name "three-piece can" .

(2) Two-piece cans  

The two-piece jar was introduced in the middle of the 20th century. The whole packaging can is composed of two pieces, namely the can body and the can lid, so it is called a two-piece can. The can body of the two-piece can is made of a thin metal plate, which is stretched and deformed by a punch through a stretching forming die, so that the can bottom and the can body are connected as a whole.