HUT61681A - Precision casting method of lost-wax pattern being under pressure - Google Patents
Precision casting method of lost-wax pattern being under pressureInfo
- Publication number
- HUT61681A HUT61681A HU577590A HU577590A HUT61681A HU T61681 A HUT61681 A HU T61681A HU 577590 A HU577590 A HU 577590A HU 577590 A HU577590 A HU 577590A HU T61681 A HUT61681 A HU T61681A
- Authority
- HU
- Hungary
- Prior art keywords
- pattern
- pressure
- mpa
- lost
- casting
- Prior art date
Links
- 238000000034 method Methods 0.000 title abstract 2
- 238000005495 investment casting Methods 0.000 title 1
- 239000002184 metal Substances 0.000 abstract 3
- 238000005266 casting Methods 0.000 abstract 2
- 239000004576 sand Substances 0.000 abstract 2
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000001419 dependent effect Effects 0.000 abstract 1
- 239000006261 foam material Substances 0.000 abstract 1
- 238000007654 immersion Methods 0.000 abstract 1
- 238000010114 lost-foam casting Methods 0.000 abstract 1
- 238000007711 solidification Methods 0.000 abstract 1
- 230000008023 solidification Effects 0.000 abstract 1
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Metal articles are formed in a lost foam casting process by forming a pattern of the article in an organic foam material and coating with a refractory and immersing the pattern in a dry sand mould, filling the mould with a molten metal and evacuating the steam and residue formed by burning the pattern with the molten metal. Allowing the casting to solidify but, before the solidified fraction exceeds 40 per cent by weight, applying an isostatic pressure within the range between 0.5 and 1.5 MPa, the pressure increasing at a rate between 0.003 and 0.3 MPa per sec dependent upon the grain size of the sand, depth of immersion and casting thickness, such that an excess pressure at the interface, having a value of between 0.002 and 0.010 MPa is reached in less than 2 secs. decreasing as the pressure increases, then maintaining a constant pressure until solidification is complete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| HU577590A HUT61681A (en) | 1990-09-04 | 1990-09-04 | Precision casting method of lost-wax pattern being under pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| HU577590A HUT61681A (en) | 1990-09-04 | 1990-09-04 | Precision casting method of lost-wax pattern being under pressure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| HU905775D0 HU905775D0 (en) | 1991-03-28 |
| HUT61681A true HUT61681A (en) | 1993-03-01 |
Family
ID=10970726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| HU577590A HUT61681A (en) | 1990-09-04 | 1990-09-04 | Precision casting method of lost-wax pattern being under pressure |
Country Status (1)
| Country | Link |
|---|---|
| HU (1) | HUT61681A (en) |
-
1990
- 1990-09-04 HU HU577590A patent/HUT61681A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| HU905775D0 (en) | 1991-03-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| DFA9 | Temporary prot. cancelled due to abandonment |