Manufacturing method of food and beverage tin box packaging

Food and beverage tin boxes can be made of two or three pieces of metal materials.

This three-piece iron can was developed in the mid-19th century and consists of a cylinder and a can. It is rolled from a flat metal with a longitudinal joint (usually welded) at each end. Almost any actual combination of height and diameter can be made into three cans. This method is particularly suitable for the manufacture of tanks of various specifications, because it is easier to change the specifications of the tanks produced.

The two-piece tin box packaging is made of a metal disc, which is reformed into a cylinder with one-piece ends. Therefore, sew the loose ends and finally close the can. The operation of remaking sheet metal parts without changing the thickness is called "stretching". Because the two-piece small can has a small diameter, the operation of not changing the thickness while transforming it into a large can is called "re-stretching". The operation of thinning the walls of two cans through a circular mold is called ironing. The drawn and ironed cans are called "DWI" or "D&I" cans. The DWI process is used to manufacture tanks with a height greater than a diameter, and is particularly suitable for manufacturing a large number of tanks with the same basic specifications.

Can lids are commonly referred to as "cans". At the tab end, the main circular part of the end is called the "end shell", and the tab is called the "lug".

Due to the large volume of cans manufactured, statistical sampling techniques must be used to inspect and control all quality aspects of the cans and the final manufacturing process. However, video scanning, light or stress testing can be applied to all finished components.

Canning raw materials

Food and beverage cans can be made of steel or aluminum, depending on the method of making the container. The raw materials of these two materials naturally exist in large quantities all over the world, so the final material of can making can be obtained at a lower cost. The can-making steel can be a tin plate, a tin plate plated with a very thin tin layer on both sides, or a tin-free tin-free steel. Both steel and aluminum are non-toxic materials, so they are very suitable for packaging food; they are both very easy to recycle after use. For many food and beverage cans, organic materials must be coated with metal to prevent chemical interaction between the metal and the product or the external environment.