Tin can is also called a seam tank. It consists of a can body, a can lid, and a can bottom. The materials used are mainly tin-plated sheet steel (tinplate and chrome-plated sheet steel).
A three-piece can is also called a seam can. It consists of a can body, a can lid, and a can bottom. The material used is mainly tin-plated sheet steel (tinplate and chrome-plated sheet steel).
Since the advent of canning in the early 19th century, three-piece cans have been used as the main packaging container in the food canning industry. The three-piece tinplate cans produced in the early days, whether it is blanking, molding, or the sealing of the can body, as well as the bottom and sealing, are performed manually.All seams are sealed by soldering, which has a very low production efficiency. . With the development of industry and technological progress, the welding technology has also been continuously improved: the advent of automatic can welding machines has eliminated the manual operation of the welding process; the invention of the flanging sealing machine and the use of liquid sealants have made it appear in the early 20th century the sealing (bottom) technology of the “double crimping” has gradually realized mechanization, and the production speed has continued to increase. However, since the advent of the three-piece tin can for more than 100 years, tin solder cans have always dominated.Since tin solder contains a large amount of heavy metal lead, it poses a serious threat to the food hygiene in the can, so the side seam bonding method and welding of side seams (ie resistance welding). Now resistance welding has become the most important method for manufacturing three-piece cans of food, and soldering has been basically eliminated.
Tin can is widely used in the canning industry as well as in other industries such as chemical industry and daily necessities. Their structures are the same, but they are different according to the requirements of use, or the structure is appropriately deformed, or a certain structure is added with appropriate accessories. For example, metal cans used for tea, biscuits, candy, solid beverages, and metal cans containing cooking oil, liquid beverages, and chemical products, are basically the same as ordinary three-piece cans.
Tin can has the following functions:
1.Protection function the protection function of the package is the most basic and important function. It should protect the product from damage and loss. In the process of circulation of goods, the factors that cause harm to them are: environmental conditions, such as temperature, humidity, gas, radiation, microorganisms, insects, rodents, etc., All of which may damage packaging and harm the product; human factors, the goods are in the process of loading, unloading and storage, due to careless or improper operation, the goods are damaged due to shock, vibration and drop, or they are crushed due to too many layers. Therefore, according to the form, characteristics, transportation environment, sales environment, and other factors of different products, the most appropriate materials, reasonable design of packaging containers and technology should be given to the packaging to protect the function, protect the safety of the products, and use dangerous goods. Special packaging, pay attention to prevent its damage to the surrounding environment and people and living things.
2.Sales function: packaging is like a silent salesman. Good packaging can attract consumers ‘attention and stimulate consumers’ desire to buy. The sales function of packaging is achieved through packaging design. Excellent packaging design, with its exquisite shapes, reasonable structure, eye-catching trademarks, decent words and bright colors, etc., Directly stimulates consumers’ desire to buy and leads to purchase behavior. Some packaging also has potential value, such as beautiful and suitable packaging containers, which can also be used to hold other items after the contents are used up. Specially shaped containers and beautifully printed decorations can not only increase the price of goods, but also promote the sale of goods. It can also be used as an art connoisseur collection.
3.Convenient functions: modern product packaging can bring a lot of convenience to people, which plays an important role in improving work efficiency and quality of life. The convenient functions of packaging should be reflected in the following aspects.
（1）Convenient handling: it means that some packages have the function of reuse. For example, turnover boxes of various materials, glass bottles for beer and beverages, and packaging waste (paper packaging, wooden packaging, metal packaging, etc.) Are recycled, which is convenient for environmental protection and conducive to saving resources.
（2）Convenient storage and transportation. For the quality and volume (size, shape, etc.) Of each packaging container, consideration should be given to the convenient loading and unloading of various transportation tools and stacking; and the quality of manual loading and unloading should generally not exceed 40% of the weight of the worker. (Limited to about 20kg), etc .; At the same time, it is necessary to consider the storage, stacking methods, shelf display effects, indoor display and storage during consumption in the warehouse, store, and house during distribution.
（3）Convenient production: for products produced in large quantities, packaging must meet the needs of production enterprises for mechanization, specialization, and automation, taking into account resource capacity and production costs, and improving labor productivity as much as possible.
（4）Convenient to use: suitable packaging should make consumers feel convenient when opening, using, keeping and storing. Such as cardboard boxes, cans, spray packaging, portable packaging, etc. Sealed with tape, explain the precautions and use methods to consumers in simple and concise language or illustrations for easy use. What is the tin can price? What is the profit of tin can?
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