JPS643080A - Removal of additive in molded article of powder - Google Patents
Removal of additive in molded article of powderInfo
- Publication number
- JPS643080A JPS643080A JP62252427A JP25242787A JPS643080A JP S643080 A JPS643080 A JP S643080A JP 62252427 A JP62252427 A JP 62252427A JP 25242787 A JP25242787 A JP 25242787A JP S643080 A JPS643080 A JP S643080A
- Authority
- JP
- Japan
- Prior art keywords
- molded article
- additive
- powder
- open face
- thin film
- 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
Landscapes
- Press-Shaping Or Shaping Using Conveyers (AREA)
Abstract
PURPOSE: To remove an additive from a molded article in a short time, by covering most of a powder molded article containing an additive with an airtight polymer thin film, pressurizing the covered face under static pressure and maintaining the open face under reduced pressure.
CONSTITUTION: Ceramic powder is blended with an additive (polystyrene) and molded into a powder molded article 3. Part of the surface of the powder molded article is left as an open face 1 and the residual part is covered with an airtight resin thin film 2 having ≥about 10μ thickness by using a vinyl acetate-based emulsion. In the operation, the area of the open face 1 is about 0.5W20% based on the whole surface area. Then the face covered with the thin film 2 is pressurized under static pressure by a pressurizing solution 6 and space part 7 adjoining the open face 1 is maintained under reduced pressure (at least about 500mmHgabs.) by a vacuum generator. Consequently the additive can be scattered and removed in a short time without giving rise to defects such as cracks and fractures in the powder molded article 3.
COPYRIGHT: (C)1989,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62252427A JPS643080A (en) | 1987-02-26 | 1987-10-08 | Removal of additive in molded article of powder |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4148787 | 1987-02-26 | ||
JP62-41487 | 1987-02-26 | ||
JP62252427A JPS643080A (en) | 1987-02-26 | 1987-10-08 | Removal of additive in molded article of powder |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH013080A JPH013080A (en) | 1989-01-06 |
JPS643080A true JPS643080A (en) | 1989-01-06 |
Family
ID=26381114
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62252427A Pending JPS643080A (en) | 1987-02-26 | 1987-10-08 | Removal of additive in molded article of powder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS643080A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04139071A (en) * | 1990-09-28 | 1992-05-13 | Ngk Spark Plug Co Ltd | Production of ceramic sintered body |
-
1987
- 1987-10-08 JP JP62252427A patent/JPS643080A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04139071A (en) * | 1990-09-28 | 1992-05-13 | Ngk Spark Plug Co Ltd | Production of ceramic sintered body |
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