TWO PIECE CAN PRINTING
principle:
The can body of the two-piece can is made of a metal sheet, which is stretched and deformed by a punching machine through a stretching die, so that the can bottom and the can body are integrated.
There are many types of cans for two-piece cans: according to the height of the can body, it can be divided into shallow-drawn cans and deep-drawn cans; according to can-making materials, it can be divided into aluminum cans and iron cans; Deep drawing cupping etc.
Advantages and disadvantages:
Compared with three-piece cans, two-piece cans have the following advantages:
①Good sealing performance. The can body is directly formed by the punching and drawing process, and there is no leakage, which can eliminate the leak detection process.
②Ensure product quality. The two-piece cans do not need to be welded and sealed to avoid lead contamination of the solder cans, and are resistant to high temperature sterilization to ensure product hygiene.
③ Beautiful and generous. The can body has no seams and beautiful appearance, and the can body can be continuously decorated and printed with good effect.
④ High production efficiency. The two-piece can has only two parts, and the manufacturing process of the can body is simple, which is of great benefit to simplify the process and improve the production capacity.
⑤ save raw materials. The can body of the two-piece can is stretched and deformed when it is formed, and the wall thickness is thinner than that of the three-piece can; in addition, the can body of the two-piece can is integrally formed, without the longitudinal seam of the can body and the seam with the can bottom, which also saves materials. .
However, two-piece cans have higher requirements on material properties, can-making technology, can-making equipment, etc., and there are fewer types of filling materials
application:
The metal cans currently used for packaging are mainly aluminum two-piece cans. The aluminum two-piece can is made of aluminum alloy thin plate as the material, and the thinning and stretching process is used in the manufacturing process, so the thickness of the can wall is obviously thinner than the bottom of the can. When used in beer packaging, the strong internal pressure compensates for the rigidity of the thin can walls. However, the high gas barrier properties, light-shielding properties and sealing properties of metal cans will keep the quality of beer in the cans stable.
And it is the presence of these metallic features that enables high-speed filling of metal cans even with isobaric filling, a time-consuming filling method
