Aluminum Cans-Comprehensive Description

Table of Contents

Cans are usually made of a can body made of aluminum alloy plates that has been thinned and stretched multiple times and a can lid made of tinplate, rolled and sealed. The aluminum materials used for the lid, pull ring, and can body are somewhat different. Aluminum cans have the advantages of light weight, small size, not easily broken, and easy to carry, and are very popular among people.

aluminum cans

History Of Aluminum Cans:

In 1959, ERNIE.C. FRAZE of the United States invented the can, which uses the material of the can lid itself to form a rivet, a pull ring on the outer cover and then riveting, with appropriate notches to form a complete can lid. .
In 1963, the pop can was invented in the United States. It inherited the shape design characteristics of previous cans and designed a pop ring on the top.
In 1980, basically all European and American markets adopted this aluminum can as the packaging form for beer and carbonated drinks. With the advancement of design and production technology, aluminum cans tend to be lighter, from the initial 60 grams to about 21 to 15 grams in 1970.

Why Choose Aluminum To Make Cans?

  • Lightweight and Durable: Aluminum is a very lightweight metal, so cans are made of aluminum, which is lighter and easier to carry and transport.
  • Corrosion resistance: Cans are often in contact with food and beverages, and aluminum has excellent corrosion resistance. Aluminum forms an oxide film on its surface, which protects the food and beverages inside from contamination and corrosion.
  • High thermal conductivity: Aluminum is an excellent thermal conductive material and can conduct heat quickly and evenly.
  • Recyclability: Aluminum is a recyclable material that can be recycled indefinitely. The energy required to recycle aluminum cans is only about 5% of the energy used to make new aluminum.
  • Food Safety: Aluminum will not penetrate or change the taste of food, nor will it release harmful substances into food or beverages.

Types Of Aluminum Alloys For Cans

Usually aluminum can lid buyers use the following four alloys as raw materials for aluminum can lids.

aluminum can lid

Can lid material: 5052 aluminum sheet, 3104 aluminum sheet;

aluminum can pull ring

Can pull ring material: 5182 aluminum sheet;

aluminum can body

Can body material: 3004 aluminum sheet.

Why Choose 3104 Aluminum To Make The Can Body?

The main reason is that 3104 aluminum alloy has unique advantages: on the one hand, it is stable in nature and does not easily react with the products it contains, ensuring the safety of food and beverages. On the other hand, 3104 is lighter. This advantage can make the sealed containers it makes lighter, easier to transport, and save costs. In addition, 3104 H19 aluminum sheet is an aluminum-manganese alloy with good metallurgical quality, excellent punching and forming performance, and good surface and mechanical properties. It is widely used in can lid materials and is well received by the market.

3104 aluminum for can body

Why Choose 5182 Aluminum Alloy To Make Can Pull Rings?

The main alloying element of 5182 alloy aluminum sheet is magnesium, and a small amount of silicon is added. Therefore, the welding performance of 5182 aluminum sheet is very good with gas welding, argon arc welding, spot welding, seam welding, etc. As a high magnesium alloy, 5182 can pull ring aluminum has the characteristics of good strength, corrosion resistance, and good machinability. Widely used in beer cans, beverage cans, rice pudding, and food cans.

5182 aluminum for can pull ring

Aluminum Can Manufacturing Process:

  1. Material preparation: usually aluminum coil or aluminum plate as raw material, the thickness is generally between 0.2-0.6mm, first of all, it is cleaned, degreased to ensure a clean surface.
  2. Forming process: There are two main types of aluminum can forming: stretch forming and stamping.
  3. Stretch forming: it refers to putting the pre-cut aluminum plate into the stretching mold, then make it deformed by mechanical pressure or hydraulic pressure in the mold, and finally form the required shape. This method is suitable for making larger size aluminum cans.
  4. Stamping: This refers to stamping the aluminum plate into the required shape through a die, and then assembling it into a complete aluminum can through bending, welding and other processes. It is suitable for making smaller size aluminum cans.
  5. Rolled edges and openings: the top of the can is rolled and the top edge is crimped.
  6. Internal Coating and Drying: The inside of the can is coated with a protective coating to prevent aluminum from coming into direct contact with food or beverages. Once the coating is complete, it goes through a drying process to cure and dry the coating.
  7. Printing and decorating: Brand logos, product information and various graphics are printed and displayed on the outside of the can.

Why Recycle Aluminum Cans?

First, aluminum is a recyclable material. Through recycling and recycling, discarded cans and other aluminum products can be reprocessed and used to produce new products. Recycling aluminum requires very little energy compared to extracting and manufacturing it from its original ore. According to statistics, recycling 1 ton of aluminum requires only about 5% of the energy, which is about 95% less than the energy consumption required to extract aluminum products from ore.
Secondly, recycling aluminum products can reduce emissions. The manufacturing process of aluminum involves activities with high energy consumption and high carbon emissions, such as mining of ores, refining of concentrates, and preparation of electrolytic aluminum. By recycling aluminum products, the carbon emissions and environmental pollution caused by these links can be avoided. According to research, approximately 9 tons of carbon dioxide emissions can be reduced by recycling 1 ton of aluminum.

FAQ

Is an aluminum can 100% aluminum?
Nope! Although aluminum cans are commonly referred to as “aluminum cans,” they are not made entirely of aluminum. They usually consist of a thin layer of aluminum coating on the inside of the can, while the outside is made of a combination of materials such as steel, tin, or plastic.
Is aluminium can safe?
Yes, aluminum cans are considered safe to use. Aluminum cans have a protective coating on the inside that prevents direct contact between the aluminum and the beverage. Aluminum cans are manufactured in compliance with strict regulations and industry standards to ensure food safety.
What are the negatives of Aluminium cans?
The production of aluminum cans requires a lot of energy and results in greenhouse gas emissions. Although aluminum is highly recyclable, the recycling process still consumes energy. If aluminum cans are not properly recycled, they can end up in landfills, causing waste. Aluminum can lining materials may contain hazardous chemicals that may pose potential health risks.

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