GB847476A - Improvements in or relating to compositions of matter suitable for the production of moulds - Google Patents

Improvements in or relating to compositions of matter suitable for the production of moulds

Info

Publication number
GB847476A
GB847476A GB847476DA GB847476A GB 847476 A GB847476 A GB 847476A GB 847476D A GB847476D A GB 847476DA GB 847476 A GB847476 A GB 847476A
Authority
GB
United Kingdom
Prior art keywords
silicate
alkali metal
mixture
liquid
binder
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
Application number
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.)
Diamond Shamrock Corp
Original Assignee
Diamond Alkali Co
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 Diamond Alkali Co filed Critical Diamond Alkali Co
Publication of GB847476A publication Critical patent/GB847476A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • 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
    • B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
    • B22C1/167—Mixtures of inorganic and organic binding agents
    • 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
    • B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
    • B22C1/18—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of inorganic agents
    • B22C1/186—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of inorganic agents contaming ammonium or metal silicates, silica sols
    • B22C1/188—Alkali metal silicates

Abstract

In forming a metal-casting mould, an intimate mixture of a finely divided refractory material and a binder consisting of a liquid alkali metal silicate and a soluble solid alkali metal silicate in admixture is applied, to a casting-defining surface and then rigidified by application of a gas such as carbon dioxide. In preferred mixtures, an organic compound such as glycerine or sucrose is included, the refractory material constitutes 90-97% by weight of the mixture, the liquid alkali metal silicate constitutes 60 to 99% by weight of the binder and has a silica to alkali metal oxide molar ratio within the range 1,55 : 1, to 3,41 : 1,0, and the solid alkali metal silicate has a silica to alkali metal oxide molar ratio between 3,41 : 1,0 and 1,0 : 2,0. According to an example, a silicate binder composition consisting of 90% liquid sodium silicate (1 Na2O : 2,48 SiO2) containing 46,6% solids and 10% powdered anhydrous sodium metasilicate was prepared by adding the solid silicate to the liquid silicate; the resultant silicate mixture had an Na2O : SiO2 ratio of 1 : 2,07 and a solids content of 51,94%. The compressive strength of a two inch square cube of a sand-silicate mixture prepared by admixing 95% fine and -5% silicate mixture, after exposure to carbon dioxide for 10 seconds was 172 p.s.i; a similarly proportioned sand-silicate mixture employing a silicate binder consisting of 100% liquid sodium silicate had a compressive strength of 55 p.s.i. Specification 847,477 is referred to.
GB847476D 1956-02-29 1956-02-29 Improvements in or relating to compositions of matter suitable for the production of moulds Expired GB847476A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US568442A US2905563A (en) 1956-02-29 1956-02-29 Alkali metal silicate binder for foundry sand molds and process

Publications (1)

Publication Number Publication Date
GB847476A true GB847476A (en) 1960-09-07

Family

ID=24271308

Family Applications (1)

Application Number Title Priority Date Filing Date
GB847476D Expired GB847476A (en) 1956-02-29 1956-02-29 Improvements in or relating to compositions of matter suitable for the production of moulds

Country Status (5)

Country Link
US (1) US2905563A (en)
BE (1) BE555362A (en)
FR (1) FR1172710A (en)
GB (1) GB847476A (en)
LU (1) LU34969A1 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3230099A (en) * 1960-09-01 1966-01-18 Dow Chemical Co Carbon dioxide cured sand molds employing dry sodium silicate binder
US3385345A (en) * 1966-03-04 1968-05-28 Ashland Oil Inc Method of making rapid curing foundry cores
DE2264206C2 (en) * 1972-12-28 1983-11-10 J.R. Short Milling Co., Chicago, Ill. Process for the production of casting mold parts and device for carrying out the process
US4121942A (en) * 1975-08-20 1978-10-24 Asamichi Kato Molding method
US4070196A (en) * 1975-09-15 1978-01-24 Foseco International Limited Binder compositions
GB1566417A (en) * 1976-11-11 1980-04-30 Foseco Int Alkali metal silicate binder compositions
US4226277A (en) * 1978-06-29 1980-10-07 Ralph Matalon Novel method of making foundry molds and adhesively bonded composites
DE2841623A1 (en) * 1978-09-25 1980-04-03 Woellner Werke FIRE PROTECTION COATING
FR2510922A1 (en) * 1981-08-07 1983-02-11 Bruss Politekhn Organo:mineral binder for moulding sands and core - comprising silicate, water soluble additives decomposing at casting temp. and water
EP0158541B1 (en) * 1984-02-06 1987-12-09 SOCIETE FRANCAISE HOECHST Société anonyme dite: Coating composition
DE3908560A1 (en) * 1989-03-16 1990-09-20 Henkel Kgaa BINDERS BASED ON AQUEOUS ALKALINE METAL SILICATE SOLUTIONS AND THEIR USE
CN109909443B (en) * 2019-04-23 2020-11-20 义乌市君胜科技有限公司 Preparation method of sodium silicate-bonded sand

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2732600A (en) * 1956-01-31 Sand cores having high-temperature strength
US2368322A (en) * 1940-02-20 1945-01-30 Passelecq Georges Core making process
US2494403A (en) * 1945-09-19 1950-01-10 United States Gypsum Co Mold composition
US2480896A (en) * 1947-09-18 1949-09-06 Gen Motors Corp Treatment of plaster of paris bonded molds with liquid hydrocarbon prior to autoclaving
US2521839A (en) * 1949-08-11 1950-09-12 Austenal Lab Inc Refractory casting mold and method of making same
GB710099A (en) * 1951-04-11 1954-06-09 Harborough Construction Compan Improvements in or relating to the production of moulds, cores and the like
US2748435A (en) * 1951-11-14 1956-06-05 Gen Motors Corp Process for reinforcing shell molds
GB745402A (en) * 1952-07-09 1956-02-22 Wilhelm Schmidt Improvements in or relating to a process for the production of moulds and cores for foundry purposes
US2749586A (en) * 1952-08-14 1956-06-12 Mercast Corp Process of forming shell mold
US2787968A (en) * 1955-09-08 1957-04-09 Nat Aluminate Corp Method of improving frictional contact between metal surfaces normally in rolling contact and resultant structure
US2861893A (en) * 1956-05-25 1958-11-25 Brumley Donaidson Co Foundry cores

Also Published As

Publication number Publication date
US2905563A (en) 1959-09-22
BE555362A (en)
LU34969A1 (en)
FR1172710A (en) 1959-02-13

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