BG100862A - Method for the preparation of ceramic shell moulds for precision casting - Google Patents
Method for the preparation of ceramic shell moulds for precision castingInfo
- Publication number
- BG100862A BG100862A BG100862A BG10086296A BG100862A BG 100862 A BG100862 A BG 100862A BG 100862 A BG100862 A BG 100862A BG 10086296 A BG10086296 A BG 10086296A BG 100862 A BG100862 A BG 100862A
- Authority
- BG
- Bulgaria
- Prior art keywords
- solution
- moulds
- surfactant
- preparation
- ceramic
- Prior art date
Links
Landscapes
- Mold Materials And Core Materials (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention relates to a method for making ceramic shellmoulds for precision moulding produced by the method of themeltable models It can be applied in metallurgy and the mechanicalengineering. By the method, suspension containing modified bindersolution of sodium metasilicate (soluble glass), refractory filler(marshallite, fireclay, zircon, corundum) and surfactant is used.The moulds are made by the immersion of the model unit in thesuspension, sprinkling with quartz sand and hardening and dryingof the layers after which layer treatment is made in10-20%-solution of a single-base carbonic acid. The bindingsolution includes the following components in %: solution ofsodium metasilicate from 53.0 to 67.0, solution of AlH3/PO4/2.3H20from 0.0 to 4.5, surfactant 0.1-1.1 and water from 27.4 to 46.7.The ceramic moulds have mechanical strength from 2.8 to 6.0 MPa,gas permeability from 140 to 160, deformation temperature over1400°C and refractoriness over 1650°C.1 claim
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BG100862A BG62041B1 (en) | 1996-09-23 | 1996-09-23 | Method for the preparation of ceramic shell moulds for precision casting |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BG100862A BG62041B1 (en) | 1996-09-23 | 1996-09-23 | Method for the preparation of ceramic shell moulds for precision casting |
Publications (2)
Publication Number | Publication Date |
---|---|
BG100862A true BG100862A (en) | 1998-03-31 |
BG62041B1 BG62041B1 (en) | 1999-01-29 |
Family
ID=3926717
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BG100862A BG62041B1 (en) | 1996-09-23 | 1996-09-23 | Method for the preparation of ceramic shell moulds for precision casting |
Country Status (1)
Country | Link |
---|---|
BG (1) | BG62041B1 (en) |
-
1996
- 1996-09-23 BG BG100862A patent/BG62041B1/en unknown
Also Published As
Publication number | Publication date |
---|---|
BG62041B1 (en) | 1999-01-29 |
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