GB799608A - Improvements in or relating to the manufacture of moulds for castings - Google Patents
Improvements in or relating to the manufacture of moulds for castingsInfo
- Publication number
- GB799608A GB799608A GB33302/55A GB3330255A GB799608A GB 799608 A GB799608 A GB 799608A GB 33302/55 A GB33302/55 A GB 33302/55A GB 3330255 A GB3330255 A GB 3330255A GB 799608 A GB799608 A GB 799608A
- Authority
- GB
- United Kingdom
- Prior art keywords
- silica
- solution
- alkali metal
- moulds
- metal silicate
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
- B22C1/18—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of inorganic agents
- B22C1/186—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of inorganic agents contaming ammonium or metal silicates, silica sols
- B22C1/188—Alkali metal silicates
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
Abstract
A binder for foundry moulds from which silica is formed in situ is an alkali metal silicate solution in which the molecular ratio <FORM:0799608/III/1> , (M being the alkali metal), is between 4.7 and 5.2 and in which the silica content is between 200 and 270 grams per litre of solution. The solutions are prepared by reaction, at a moderate temperature and atmospheric pressure, of hydrated silica and a commercial solution of alkali metal silicate. In an example, a solution of sodium trisilicate 38-40 B<\>ae, silica gel containing 14 per cent water, and water, are mixed and heated to 95 DEG C. Instead of silica gel, precipitated silica or fossil silica of the kieselguhr type may be used. In a further example, potassium trisilicate and precipitated silica are used. Specification 715,576 is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR799608X | 1954-12-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB799608A true GB799608A (en) | 1958-08-13 |
Family
ID=9236877
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB33302/55A Expired GB799608A (en) | 1954-12-30 | 1955-11-21 | Improvements in or relating to the manufacture of moulds for castings |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB799608A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1508734B1 (en) * | 1965-06-02 | 1972-03-09 | Tsnii Technologii Mash | Liquid self-curing mixture for the production of molds and mold cores |
-
1955
- 1955-11-21 GB GB33302/55A patent/GB799608A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1508734B1 (en) * | 1965-06-02 | 1972-03-09 | Tsnii Technologii Mash | Liquid self-curing mixture for the production of molds and mold cores |
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