FIELD: foundry; may be used in jewelry industry in manufacture of investment molds for casting of noble and nonferrous metals and alloys. SUBSTANCE: mixture of gypsum and water contains silicon-containing material and fluorine-containing stabilizing additive in the form of calcinated quartzite and dihydrophosphate with the following amounts of components, wt.-%: calcinated quartzite, 52.0-57.0; gypsum, 15.0-20.0; dihydrophosphate 0.0-2.0; water, the balance. EFFECT: higher efficiency. 1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| MOLDING SAND FOR JEWELRY CASTING | 2000 |
|
RU2165817C1 |
| MIXTURE FOR PRODUCING CASTING MOULDS WITH USE OF INVESTMENT PATTERNS | 0 |
|
SU904869A1 |
| COMPOSITION FOR MAKING FOUNDRY MOULDS | 0 |
|
SU1243882A1 |
| 0 |
|
SU519272A1 | |
| MIXTURE FOR MANUFACTURING MOLDS AND RODS ON GYPSUM BINDER IN PRODUCTION OF NONFERROUS AND PRECIOUS ALLOY CASTINGS | 2000 |
|
RU2175902C1 |
| MOULDING SAND FOR MAKING INVESTMENT MOULDS | 0 |
|
SU1115835A1 |
| SAND FOR MAKING MOLDS AND CORES WITH GYPSUM BINDER AT PRODUCING CASTINGS OF NON- FERROUS AND PRECIOUS ALLOYS | 2000 |
|
RU2163854C1 |
| SAND MIXTURE FOR MANUFACTURING INVESTMENT MOULDS | 0 |
|
SU1142213A1 |
| MOULDING FILLING SAND WITH INCREASED GAS PERMEABILITY FOR PRODUCTION OF CASTS OUT OF NON-FERROUS ALLOYS | 2008 |
|
RU2383410C1 |
| MIXTURE FOR FABRICATING OF CASTED MODELS FORMS | 2007 |
|
RU2327543C1 |
