Method of manufacturing resin coated aluminum alloy plates for drawn and ironed cans
US6270589A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 18, 1999 |
| Grant date | Aug 7, 2001 |
| Priority date | — |
| Expiry date | Aug 18, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2439/66
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method of manufacturing a resin-coated aluminum alloy sheet for drawn and ironed cans, which coated sheet can be subsequently formed into a drawn and ironed can without its wall breaking, and having substantial strength, the can-forming process including a bending and bending back operation at a die shoulder rounded portion of small radius, and a subsequent dry ironing operation. The coated sheet is formed by homogenization heat treating an aluminum alloy ingot containing essentially 0.5 to 2.0 wt % of Mn, 0.2 to 2.0 wt % of Mg, 0.05 to 0.4 wt % of Si and not more than 0.7 wt % of Fe, wherein (Si+Fe).ltoreq.0.9 wt %, and subjecting the aluminum alloy ingot to hot rolling to obtain an aluminum alloy sheet, followed by continuous annealing, cold rolling, and surface treatment, heating the resultant sheet, and then coating both surfaces of the sheet with a thermoplastic resin at a predetermined temperature, and immediately quenching the sheet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.