How to make iron box packaging for food and beverages

Iron box packaging for food and beverages can be made of two or three metal materials.

The three-piece iron can was developed in the mid-19th century and consisted of a cylinder and a can, which was 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, as it is easier to change the specifications of the tanks produced.

The two-piece iron box packaging is made of a metal disc that is reformed into a cylinder with an integrated end. So sew the loose ends and finally close the can. The operation of re-made sheet metal without changing the thickness is called "stretching". Because the two-piece small jar has a small diameter, the operation of not changing the thickness while transforming it into a large jar is called "restretching". The operation of thinning the walls of two cans through a circular mold is called ironing. Drawn and ironed jars are called "DWI" or "D&I" jars. The DWI process is used to make tanks with heights greater than diameters and is particularly suitable for the manufacture of large tanks of the same basic specifications.

The can lid is commonly called "can". At the end of the pull ring, the main circular portion of the end is called the "end shell" and the pull ring is called the "lug".

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

Car making 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 are naturally present in large quantities around the world, so the final materials for canning can be obtained at a lower cost. The steel for canning can be a tin plate, a tin plate with a very thin layer of tin plate on both sides, or a Wuxi steel without tin. Steel and aluminum are non-toxic materials, so they are very suitable for packaged foods; they are also very easy to recycle after use. For many food and beverage cans, organic materials must be coated with metal to prevent chemical action between the metal and the product or the external environment.