JPS5550953A - Production of ceramic core for precision casting - Google Patents
Production of ceramic core for precision castingInfo
- Publication number
- JPS5550953A JPS5550953A JP12536578A JP12536578A JPS5550953A JP S5550953 A JPS5550953 A JP S5550953A JP 12536578 A JP12536578 A JP 12536578A JP 12536578 A JP12536578 A JP 12536578A JP S5550953 A JPS5550953 A JP S5550953A
- Authority
- JP
- Japan
- Prior art keywords
- core
- binder
- materials
- colloidal silica
- raw material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
PURPOSE: To improve strength without heating and firing the core and prevent the occurrence of deformation by mixing sublimatable materials and polyethylene base surfactants as a binder to refractory aggregate, thereby preparing the raw material for core.
CONSTITUTION: Sublimatable materials such as napthalene or other 2W30w% and further polyethylene base surfactants 0.2W5w% to improve molding effect are melted at a temperature above 50°C and are mixed and used as a binder to the refractory aggregate mixed with one or two or more kinds of refractory aggregates such as of alumina and others being ceramic raw materials. The core is molded by using the raw material thus prepared and in the next stage the binder is let to decompose and dissipate, whereby the core having moderate voids is provided. Colloidal silica is impregnated in these voids under a vacuum and further it is frozen at a low temperature below 0°C and is then dried at ordinary temperature. Thereupon, the gelling of the colloidal silica accelerates and the strength necessary for the ceramic core is readily obtained.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12536578A JPS5550953A (en) | 1978-10-12 | 1978-10-12 | Production of ceramic core for precision casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12536578A JPS5550953A (en) | 1978-10-12 | 1978-10-12 | Production of ceramic core for precision casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5550953A true JPS5550953A (en) | 1980-04-14 |
Family
ID=14908320
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12536578A Pending JPS5550953A (en) | 1978-10-12 | 1978-10-12 | Production of ceramic core for precision casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5550953A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5770052A (en) * | 1980-10-20 | 1982-04-30 | Toyota Motor Corp | Production of mold |
| FR2592789A1 (en) * | 1986-01-14 | 1987-07-17 | Bourrelly Georges | Process for preparing a ceramic paste for dental prosthesis keeping an identical coloration after firing |
| EP0371895A2 (en) * | 1988-11-30 | 1990-06-06 | Howmet Corporation | Method of making ceramic cores and other articles |
| CN112703072A (en) * | 2018-09-19 | 2021-04-23 | 弗劳恩霍夫应用研究促进协会 | Casting core for a casting mould and method for producing a casting core |
-
1978
- 1978-10-12 JP JP12536578A patent/JPS5550953A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5770052A (en) * | 1980-10-20 | 1982-04-30 | Toyota Motor Corp | Production of mold |
| FR2592789A1 (en) * | 1986-01-14 | 1987-07-17 | Bourrelly Georges | Process for preparing a ceramic paste for dental prosthesis keeping an identical coloration after firing |
| EP0371895A2 (en) * | 1988-11-30 | 1990-06-06 | Howmet Corporation | Method of making ceramic cores and other articles |
| EP0371895A3 (en) * | 1988-11-30 | 1991-06-12 | Howmet Corporation | Method of making ceramic cores and other articles |
| CN112703072A (en) * | 2018-09-19 | 2021-04-23 | 弗劳恩霍夫应用研究促进协会 | Casting core for a casting mould and method for producing a casting core |
| CN112703072B (en) * | 2018-09-19 | 2023-08-08 | 弗劳恩霍夫应用研究促进协会 | Casting core for casting mold and method for producing casting core |
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