Coating agent for electrical steel sheet, manufacturing method therefor and electrical steel sheet coating method using same
US-2016322138-A1 · Nov 3, 2016 · US
Method for rust-proofing mold
US9347135B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9347135-B2 |
| Application number | US-201114350967-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 18, 2011 |
| Priority date | Oct 18, 2011 |
| Publication date | May 24, 2016 |
| Grant date | May 24, 2016 |
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- Title
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Abstract
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A method for rust-proofing a mold, which is capable of reducing the time and the cost required for rust-proofing the mold. The method includes an iron hydroxide-forming step for forming iron hydroxide on a predetermined part of the surface of the mold, and a surface-treating step for forming a film covering the molding surface of the mold, and for changing the iron hydroxide formed on the mold into black rust, by heating the mold, under an oxygen-deficiency atmosphere, on which the iron hydroxide is formed in the iron hydroxide-forming step.
First claim
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The invention claimed is: 1. A method for rust-proofing a mold having a molding surface and at least one cooling channel through which cooling water flows, the cooling channel being bored from a surface other than the molding surface of the mold toward an inside of the mold, comprising: an iron hydroxide-forming step for forming iron hydroxide on a whole surface of the at least one cooling channel; and a surface-treating step for forming a film covering the molding surface of the mold and for changing the iron hydroxide formed on the whole surface of the at least one cooling channel into black rust, by heating the mold on which the iron hydroxide is formed in the iron hydroxide-forming step under an oxygen-deficiency atmosphere containing an inert gas and a reactive gas for forming the film. 2. The method according to claim 1 , wherein in the iron hydroxide-forming step, a black-rust accelerant containing water and a material with reducibility is applied to the whole surface of the at least one cooling channel. 3. The method according to claim 1 , wherein the iron hydroxide-forming step is a step for performing a water-flow test of the cooling channel. 4. The method according to claim 1 , wherein the film covering the molding surface of the mold is a carbon film. 5. The method according to claim 4 , wherein in the surface-treating step, the inert gas is supplied from a side on which the molding surface of the mold is situated.
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- What does patent US9347135B2 cover?
- A method for rust-proofing a mold, which is capable of reducing the time and the cost required for rust-proofing the mold. The method includes an iron hydroxide-forming step for forming iron hydroxide on a predetermined part of the surface of the mold, and a surface-treating step for forming a film covering the molding surface of the mold, and for changing the iron hydroxide formed on the mold …
- Who is the assignee on this patent?
- Yamauchi Ikuo, Furukawa Yuichi, Toyota Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification C23C22/74. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue May 24 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). 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).