Aluminum sheet Rolls for easy open cap

The production process of the easy-open aluminum beverage can is relatively complicated. It is formed by continuous high-speed stamping and riveting of the Aluminum sheet Rolls for easy open cap coated with the paint film on a special lid-making machine. The made easy-open cover not only requires beautiful appearance, good sealing performance, strong spray corrosion, but also can withstand a certain pressure. Therefore, there are higher requirements for the board used.
 
The Aluminum sheet Rolls for easy open cap requires high dimensional accuracy and good surface quality, the thickness tolerance is ±0.008~0.013 mm, the surface finish Ra is 0.25 ± 10 microns, and the flatness I value is less than 6. In addition, the strength quotient, uniform performance and good formability are also required, and a layer of protective paint is applied on both sides of the board, which can resist the corrosion of strong acidic or alkaline substances.
 
The alloys and states of the commonly used Aluminum sheet Rolls for easy open cap are 5052-H19. When there is no internal pressure beverage such as coffee in the can, use medium-strength 5052-H19; when the beverage in the can is a refreshing beverage with internal pressure <49 North Pa) due to carbon dioxide, use high-strength 5082--HI9 and 5182--H19.
 
The commonly used Aluminum sheet Rolls for easy open cap include 5042, 5082 and 5182, etc. The thickness and alloy state of the plate used are determined according to the form of the pull ring and the alloy of the cover material used. In my country, when most manufacturers produce pull-type pull rings, the thickness of the pulley is slightly thinner than that of the cover material. In order to ensure that the riveting point is not pulled apart when it is opened, an alloy and state with higher strength than the cover material should be used.