1 / 3

China Stubby 250ml Supplier, Factories

The two-piece can, also known as the pressed can, is a metal container composed of a can lid and a seamless can body. Its main materials include aluminum, tin-plated plates and chrome-plated plates. It is widely used in the packaging of carbonated beverages and food.

Send Inquiry

Product Description

What is a two-piece can

The can body is integrally formed by processes such as stamping and deep drawing. The inner wall coating is complete to prevent metal contamination, and the outer wall is smooth for easy printing. It features strong sealing performance, light weight and high production efficiency, but the equipment investment is large and the tank type is single.

The manufacturing process of two-piece jars

Cupping and drawing: Coil material cutting - pre-stretching and stamping to form blank - multiple stretching to thin out - bottom forming by punching - trimming - cleaning lubricating oil - drying - applying white enamel - surface printing - applying inner wall - drying - necking and flanging - leak detection

Deep drawing cupping: material cutting - top cup flushing - re-cup flushing (several times) - flanging - bottom flushing to form - trimming - surface finishing - leak detection

The application of two-piece cans

At present, the metal cans mainly used for packaging are aluminum two-piece cans. The aluminum two-piece can is made of thin aluminum alloy plates. During the manufacturing process, a thinning and stretching technique is employed, so the thickness of the can wall is significantly thinner than that of the can bottom.

When used for beer packaging, the strong internal pressure will compensate for the rigidity of the thin can wall. However, the high gas barrier, light-blocking and sealing properties of metal cans will keep the quality of the beer inside stable.

Frequently Asked Questions

What materials are used to make two-piece cans?

Two-piece cans are primarily manufactured using aluminum, tin-plated plates, and chrome-plated plates. Aluminum is the most common choice for beverage packaging.

Why are two-piece cans preferred for carbonated beverages?

They offer exceptional sealing performance and high gas barrier properties. For beverages like beer, the internal pressure helps support the thin walls, ensuring the product remains stable and fresh.

What is the structural difference between a two-piece can and others?

A two-piece can consists of only two parts: an integrally formed seamless body (including the bottom) and a separate lid, whereas other types may have multiple seams.

Are two-piece cans efficient to produce?

Yes, they feature high production efficiency. The body is formed through advanced stamping and deep drawing processes which allow for rapid mass production.

How is the quality of the content protected inside the can?

The inner wall is coated to prevent metal contamination. Additionally, the metal's light-blocking properties and high-quality seals protect the contents from light and oxygen.

What are the main manufacturing techniques for these jars?

The two primary methods are "Cupping and Drawing" (which involves thinning and stretching) and "Deep Drawing Cupping" (which involves multiple flushing stages).