Method for producing aluminum can sheet

By homogenizing aluminum alloy ingots at lower temperatures and controlling recrystallization through self- and batch-annealing, the method produces aluminum can sheets with reduced ear formation and energy consumption, addressing production challenges and environmental impact.

JP2025523687APending Publication Date: 2025-07-23HELLENIC RES CENT FOR METALS SA
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Patent Information

Application Number
JP2025501589
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2022-07-14
Filing Date
2023-06-19
Publication Date
2025-07-23

AI Technical Summary

Technical Problem

Existing methods for producing aluminum can sheets using single stand reversing hot rolling mills result in high ear formation, which leads to issues like insufficient trimming, trimmer jamming, and transportation problems, while also requiring high energy consumption and capital investment.

Method used

A method involving homogenization of the aluminum alloy ingot at a lower temperature (460°C - 525°C) followed by hot rolling in a single stand mill, self-annealing or batch annealing to control recrystallization, and cold rolling to produce a sheet with controlled ear formation and reduced energy consumption.

Benefits of technology

The method achieves lower ear formation, improved can stability, and reduced CO2 emissions by utilizing higher recycled aluminum content with controlled ear profiles, minimizing trimming issues and energy use.

✦ Generated by Eureka AI based on patent content.

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Abstract

A method for manufacturing an aluminum can sheet includes providing a body made of an aluminum alloy type AA3004, AA3104, or another aluminum alloy suitable for making an aluminum can sheet; homogenizing the body at a homogenization temperature of about 525 °C or less; hot rolling the homogenized body with a single stand hot rolling mill to produce a hot rolled sheet, wherein the hot rolled sheet exits the single stand hot rolling mill at a hot rolling exit temperature lower than the hot rolling start temperature at a hot rolling mill exit gauge; annealing the sheet to form a recrystallized hot rolled sheet; and cold rolling the recrystallized annealed sheet to apply cold rolling and produce a cold rolled sheet with a final gauge.
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