Laminated hard coating and molding die
US-2017291211-A1 · Oct 12, 2017 · US
Die for ironing working and die module
US2021069767A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2021069767-A1 |
| Application number | US-202017099487-A |
| Country | US |
| Kind code | A1 |
| Filing date | Nov 16, 2020 |
| Priority date | Aug 26, 2015 |
| Publication date | Mar 11, 2021 |
| Grant date | — |
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- Title
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Abstract
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A method of producing aluminum cans, including an ironing step using an ironing die (30). The ironing die has a carbon film (50) formed as to cover a working surface thereof. The carbon film exhibits a Raman spectrum such that an intensity ratio represented by ID/IG wherein ID is a maximum peak intensity at 1333±10 cm−1 in the Raman spectrum of the surface of said carbon film, and IG is a maximum peak intensity at 1500±100 cm−1 in the Raman spectrum of the surface of said carbon film, is not less than 1.2. The surface of the carbon film is a smooth surface having an arithmetic mean roughness R of not more than 0.05 μm. Further, the ironing step includes iron-working an aluminum sheet in a dry process using no lubricant while maintaining an ironing ratio in excess of 40%.
First claim
Opening claim text (preview).
What is claimed is: 1 . A method of producing aluminum cans, including an ironing step using an ironing die, wherein: said ironing die has a carbon film that is formed to cover a working surface thereof; said carbon film exhibits such a Raman spectrum such that an intensity ratio represented by the following formula (1), I D /I G (1) wherein I D is a maximum peak intensity at 1333±10 cm −1 in the Raman spectrum of the surface of said carbon film, and I G is a maximum peak intensity at 1500±100 cm −1 in the Raman spectrum of the surface of said carbon film, is not less than 1.2; the surface of said carbon film is a smooth surface having an arithmetic mean roughness R of not more than 0.05 μm; and said ironing step comprises iron-working an aluminum sheet in a dry process using no lubricant while maintaining an ironing ratio in excess of 40%.
Assignees
Inventors
Classifications
Lubricating {, e.g. lubricating tool and workpiece simultaneously (lubricating workpieces for deep-drawing B21D22/201)} · CPC title
Diamond only · CPC title
Heating or cooling · CPC title
- B21D37/01Primary
Selection of materials · CPC title
- B21D22/28Primary
of cylindrical articles using consecutive dies · CPC title
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- What does patent US2021069767A1 cover?
- A method of producing aluminum cans, including an ironing step using an ironing die (30). The ironing die has a carbon film (50) formed as to cover a working surface thereof. The carbon film exhibits a Raman spectrum such that an intensity ratio represented by ID/IG wherein ID is a maximum peak intensity at 1333±10 cm−1 in the Raman spectrum of the surface of said carbon film, and IG is a maxim…
- Who is the assignee on this patent?
- Toyo Seikan Group Holdings Ltd
- What technology area does this patent fall under?
- Primary CPC classification B21D37/01. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu Mar 11 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).