Ceramic core and method for producing same
US-2015321247-A1 · Nov 12, 2015 · US
Method of manufacturing ceramic sintered body and ceramic sintered body
US10040116B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10040116-B2 |
| Application number | US-201514907762-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 12, 2015 |
| Priority date | Feb 13, 2014 |
| Publication date | Aug 7, 2018 |
| Grant date | Aug 7, 2018 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
There is provided a manufacturing method including: forming a molded body element with a molding material containing a ceramic powder and a binder; forming a ceramic molded body by disposing at least one molded body element in a mold and then injecting a molding material containing a ceramic powder and a binder into the mold and graft molding a graft molded body element to the molded body element; and forming a ceramic sintered body by degreasing and sintering the ceramic molded body. A graft connecting surface of the molded body element to which the graft molded body element is graft molded is formed so as to have a surface roughness of 2 μm or more in terms of Ra.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method of manufacturing a ceramic sintered body, comprising: forming a molded body element with a molding material containing a ceramic powder and a binder; forming a ceramic molded body by disposing the molded body element in an injection molding mold and then injecting a molding material containing a ceramic powder and a binder into a space within the injection molding mold and graft molding a graft molded body element to the molded body element; and forming the ceramic sintered body by degreasing and sintering the ceramic molded body, wherein a graft connecting surface of the molded body element to which the graft molded body element is graft molded is formed so as to have a surface roughness of 2 μm or more in terms of Ra, and the molded body element is previously increased in temperature to 5° C. or more lower than a melting point of the binder contained in the molded body element before the graft molded body element is graft molded. 2. The method of manufacturing the ceramic sintered body according to claim 1 , wherein the molded body element is previously increased in temperature to 32° C. or higher. 3. The method of manufacturing the ceramic sintered body according to claim 1 , applied to a method of manufacturing a ceramic core which is used for casting a turbine blade having a hollow structure and has a shape corresponding to the hollow structure of the turbine blade. 4. The method of manufacturing the ceramic sintered body according to claim 3 , wherein at least part of the molded body element is formed into a shape corresponding to the hollow structure of a blade portion of the turbine blade.
Assignees
Inventors
Classifications
Injection moulding · CPC title
Alkali metal oxides or oxide-forming salts thereof · CPC title
- B22C9/24Primary
for hollow articles · CPC title
Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina · CPC title
Flame, plasma or melting treatment · CPC title
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- What does patent US10040116B2 cover?
- There is provided a manufacturing method including: forming a molded body element with a molding material containing a ceramic powder and a binder; forming a ceramic molded body by disposing at least one molded body element in a mold and then injecting a molding material containing a ceramic powder and a binder into the mold and graft molding a graft molded body element to the molded body eleme…
- Who is the assignee on this patent?
- Hitachi Metals Ltd
- What technology area does this patent fall under?
- Primary CPC classification B22C9/24. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Aug 07 2018 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).