GB570719A - Improvements in or relating to moulds for casting metals - Google Patents
Improvements in or relating to moulds for casting metalsInfo
- Publication number
- GB570719A GB570719A GB74244A GB74244A GB570719A GB 570719 A GB570719 A GB 570719A GB 74244 A GB74244 A GB 74244A GB 74244 A GB74244 A GB 74244A GB 570719 A GB570719 A GB 570719A
- Authority
- GB
- United Kingdom
- Prior art keywords
- moulds
- materials
- bonding
- chromium
- olivine
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Ceramic Products (AREA)
Abstract
570,719. Mould materials. GOLDSCHMIDT, V. M. Jan. 14, 1944, No. 742. [Class 83 (i)] Moulds are made from granular olivine or other material rich in magnesium orthosilicate, substantially free from grains less than 0.15 mm. in diameter, and bonding material. The orthosilicate preferably contains under 13 per cent of iron calculated as FeO and the upper limit of the grain size may be about 0.5 to 5 mm. The bonding material should preferably have a specific gravity different from that of the granular material to assist separation of materials when making new from old moulds. Suitable bonding materials are bentonite, Portland cement, or magnesium oxide. The moulds may be faced with very finely-divided olivine &c. mixed with water or other liquid applied by a spray or brush. The particle size for the bulk of this material may be 'about 0.002 mm. and the thickness of the coating 0.2 to 1.0 mm. The facing material may also include some non-aluminous and non-calcareous refractory material, e.g. graphite, carbon, or magnesium oxide and a small quantity of gum, resin, or waterglass. Moulds made in this way can, after use, be freed from the bonding material by crushing and air classification. The moulds are suitable for casting alloys of iron with chromium or with chromium and nickel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB74244A GB570719A (en) | 1944-01-14 | 1944-01-14 | Improvements in or relating to moulds for casting metals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB74244A GB570719A (en) | 1944-01-14 | 1944-01-14 | Improvements in or relating to moulds for casting metals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB570719A true GB570719A (en) | 1945-07-19 |
Family
ID=9709728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB74244A Expired GB570719A (en) | 1944-01-14 | 1944-01-14 | Improvements in or relating to moulds for casting metals |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB570719A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2822278A (en) * | 1951-09-07 | 1958-02-04 | Int Minerals & Chem Corp | Foundry composition |
| US2997758A (en) * | 1957-01-14 | 1961-08-29 | Skf Svenska Kullagerfab Ab | Hot tops for ingot moulds and method of making the same |
| FR2034872A1 (en) * | 1969-03-13 | 1970-12-18 | Sulzer Ag |
-
1944
- 1944-01-14 GB GB74244A patent/GB570719A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2822278A (en) * | 1951-09-07 | 1958-02-04 | Int Minerals & Chem Corp | Foundry composition |
| US2997758A (en) * | 1957-01-14 | 1961-08-29 | Skf Svenska Kullagerfab Ab | Hot tops for ingot moulds and method of making the same |
| FR2034872A1 (en) * | 1969-03-13 | 1970-12-18 | Sulzer Ag |
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