Core positioning
US-2015377038-A1 · Dec 31, 2015 · US
Precision-casting core, precision-casting core manufacturing method, and precision-casting mold
US10166598B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10166598-B2 |
| Application number | US-201414893101-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 28, 2014 |
| Priority date | May 29, 2013 |
| Publication date | Jan 1, 2019 |
| Grant date | Jan 1, 2019 |
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- Title
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Abstract
Official abstract text for this publication.
A coating layer including solely silicon alkoxide or mixed alkoxide of silicon alkoxide and aluminum alkoxide is formed on a surface of a sintered precision-casting core body mainly including silica particles so as to seal holes formed in the surface. As a result, it is possible to prevent the breakage of the core during casting.
First claim
Opening claim text (preview).
The invention claimed is: 1. A precision-casting core obtained by forming a coating layer of two kinds of silica materials having different particle diameters on a surface of a sintered precision-casting core body mainly including silica particles, wherein the two kinds of silica materials having different particle diameters comprise silica sol and silica fume having larger particle diameters than the silica sol, the silica fume consisting of spherical particles, and the silica sol and the silica fume have a weight ratio of 1:1 to 2:1. 2. A precision-casting mold used to manufacture cast metal, comprising: a precision-casting core obtained by forming a coating layer of two kinds of silica materials having different particle diameters on a surface of a sintered precision-casting core body mainly including silica particles having a shape corresponding to a cavity inside the cast metal; and an outer mold corresponding to the shape of the outer peripheral surface of the cast metal, wherein the two kinds of silica materials having different particle diameters comprise silica sol and silica fume having larger particle diameters than the silica sol, the silica fume consisting of spherical particles, and the silica sol and the silica fume have a weight ratio of 1:1 to 2:1. 3. A precision-casting core manufacturing method comprising: immersing a sintered body of a precision-casting core body mainly including silica particles into a coating material including two kinds of silica materials having different particle diameters; drying the sintered body; and heating the sintered body so as to form a coating layer on the surface of the precision-casting core body, wherein the two kinds of silica materials having different particle diameters comprise silica sol and silica fume having larger particle diameters than the silica sol, the silica fume consisting of spherical particles, and the silica sol and the silica fume have a weight ratio of 1:1 to 2:1.
Assignees
Inventors
Classifications
Use of lost patterns · CPC title
- B22C9/10Primary
Cores; Manufacture or installation of cores {(breaker cores B22C9/084)} · CPC title
Sand moulds or like moulds for shaped castings · CPC title
for hollow articles · CPC title
Selection of compositions for coating the surfaces of moulds, cores, or patterns · CPC title
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Frequently asked questions
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- What does patent US10166598B2 cover?
- A coating layer including solely silicon alkoxide or mixed alkoxide of silicon alkoxide and aluminum alkoxide is formed on a surface of a sintered precision-casting core body mainly including silica particles so as to seal holes formed in the surface. As a result, it is possible to prevent the breakage of the core during casting.
- Who is the assignee on this patent?
- Mitsubishi Heavy Ind Ltd, Mitsubish Heavy Ind Ltd
- What technology area does this patent fall under?
- Primary CPC classification B22C9/10. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Jan 01 2019 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).