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 wastage

Info

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
Application number
FR7118697A
Other languages
French (fr)
Other versions
FR2138356B1 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Messier SA
Original Assignee
Messier SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Messier SA filed Critical Messier SA
Priority to FR7118697A priority Critical patent/FR2138356A1/en
Publication of FR2138356A1 publication Critical patent/FR2138356A1/en
Application granted granted Critical
Publication of FR2138356B1 publication Critical patent/FR2138356B1/fr
Granted legal-status Critical Current

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.
FR7118697A 1971-05-24 1971-05-24 Hardening sodium silicate bound foundry sand - with avoidance of carbon dioxide wastage Granted FR2138356A1 (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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