A tin can is a small container meant for storage and distribution of goods. Oftenly, most of the cans require removable covers while others require some cutting. Companies use cans for various purposes including storing food for sale, holding beverages, chemicals, oil among other uses. Tin can manufacture process involves multiple processes including seaming and fabrication.
The seaming process entails joining the can body and the ends through micro-seaming. There are various steps in this process which includes flanging the body with one of the cans end getting curled, joining the curled can and the can body. A can use maker machine for seaming operation consist of the closing station, base slate, seaming chuck, and operation rolls. A base slate supports the body of the can while the seaming chuck holds the cover on the can body, but sometimes it can act as seaming roll pressure back up.
The modern micro-seaming process incorporates all the previous seaming except when re-dimensioning and re-designing the operation rolls. When re-designing the can, the level of hardness and thickness of the metal material is adjusted to obtain the desired length and size. There is also conventional seaming where the curves are designed and re-dimension of second operation rolls.
After completion of the first seam operation, operation roll is retracted, and it can no longer contact the can end. There is a micro-seam improvement that enables a user to obtain a tin can with substantial material savings.
There are several stages in can fabrication
- Formation of the tube and soldering the seams
- Joining the body with the bottom end
- Attaching labels and printing
- Filling the content
- Sterilization or retorting
- Joining the body with the top end
Commonly, double seaming is usually preferred when joining the ends with the body to prevent leakage. However, this process sometimes might deform the rims.
Size and Material
Cans can be of different sizes and shapes, but the commons ones are the tuna tin and the soup tin. The walls of these cans are usually stiffened with bulges to help in resisting dents that might cause splitting of the seams. In most local dialects, all-metal cans are referred to as tin can although some are made from aluminium. Some of the cans are made using the tin-free steel, and in some parts like the UK, they produce foods that have a plastic coating to prevent acids corroding the can.
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