FR2138356A1 - Hardening sodium silicate bound foundry sand - with avoidance of carbon dioxide wastage - Google Patents
Hardening sodium silicate bound foundry sand - with avoidance of carbon dioxide wastageInfo
- Publication number
- FR2138356A1 FR2138356A1 FR7118697A FR7118697A FR2138356A1 FR 2138356 A1 FR2138356 A1 FR 2138356A1 FR 7118697 A FR7118697 A FR 7118697A FR 7118697 A FR7118697 A FR 7118697A FR 2138356 A1 FR2138356 A1 FR 2138356A1
- Authority
- FR
- France
- Prior art keywords
- sodium silicate
- wastage
- avoidance
- carbon dioxide
- approx
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/03—Sand moulds or like moulds for shaped castings formed by vacuum-sealed moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/12—Treating moulds or cores, e.g. drying, hardening
- B22C9/123—Gas-hardening
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
Process for hardening foundry sands bound with sodium silicate in a closed box comprises (a) a vacuum phase treatment carried out at is approx. 30 mm Hg for is approx. 1 min. (b) a pressurised CO2 phase treatment, using CO2 at is approx. 2 bars for is approx. 1 min. and (c) recovering unused CO2, to leave a residual pressure of is approx. 50 mm/Hg.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7118697A FR2138356A1 (en) | 1971-05-24 | 1971-05-24 | Hardening sodium silicate bound foundry sand - with avoidance of carbon dioxide wastage |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7118697A FR2138356A1 (en) | 1971-05-24 | 1971-05-24 | Hardening sodium silicate bound foundry sand - with avoidance of carbon dioxide wastage |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2138356A1 true FR2138356A1 (en) | 1973-01-05 |
FR2138356B1 FR2138356B1 (en) | 1973-12-28 |
Family
ID=9077514
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7118697A Granted FR2138356A1 (en) | 1971-05-24 | 1971-05-24 | Hardening sodium silicate bound foundry sand - with avoidance of carbon dioxide wastage |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2138356A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104439093A (en) * | 2014-11-28 | 2015-03-25 | 浙江海阳光伏有限公司 | Hardening process of sodium silicate sand and vacuum case applied to the process |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2874428A (en) * | 1956-03-01 | 1959-02-24 | Bonney Floyd Co | Method of hardening of sand cores and the like |
US2876510A (en) * | 1957-05-06 | 1959-03-10 | Lothar R Zifferer | Apparatus for curing a moldable object with carbon dioxide |
FR1463424A (en) * | 1965-01-12 | 1966-12-23 | Masch Und Appbau Dietikon Ag | Improvement of closing devices, especially for autoclaves |
US3511593A (en) * | 1967-05-15 | 1970-05-12 | American Sterilizer Co | Door closing and locking means for autoclaves and the like |
-
1971
- 1971-05-24 FR FR7118697A patent/FR2138356A1/en active Granted
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2874428A (en) * | 1956-03-01 | 1959-02-24 | Bonney Floyd Co | Method of hardening of sand cores and the like |
US2876510A (en) * | 1957-05-06 | 1959-03-10 | Lothar R Zifferer | Apparatus for curing a moldable object with carbon dioxide |
FR1463424A (en) * | 1965-01-12 | 1966-12-23 | Masch Und Appbau Dietikon Ag | Improvement of closing devices, especially for autoclaves |
US3511593A (en) * | 1967-05-15 | 1970-05-12 | American Sterilizer Co | Door closing and locking means for autoclaves and the like |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104439093A (en) * | 2014-11-28 | 2015-03-25 | 浙江海阳光伏有限公司 | Hardening process of sodium silicate sand and vacuum case applied to the process |
Also Published As
Publication number | Publication date |
---|---|
FR2138356B1 (en) | 1973-12-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |