GB1115441A - Improvements relating to the production of metal and alloy castings - Google Patents

Improvements relating to the production of metal and alloy castings

Info

Publication number
GB1115441A
GB1115441A GB2306/65A GB230665A GB1115441A GB 1115441 A GB1115441 A GB 1115441A GB 2306/65 A GB2306/65 A GB 2306/65A GB 230665 A GB230665 A GB 230665A GB 1115441 A GB1115441 A GB 1115441A
Authority
GB
United Kingdom
Prior art keywords
calcium phosphate
phosphate
composition
microns
particle size
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
GB2306/65A
Inventor
Kenneth Rose
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.)
Doulton and Co Ltd
Original Assignee
Doulton and Co Ltd
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 Doulton and Co Ltd filed Critical Doulton and Co Ltd
Priority to GB2306/65A priority Critical patent/GB1115441A/en
Priority to US520397A priority patent/US3473599A/en
Priority to FR46369A priority patent/FR1464455A/en
Priority to DE19661508633 priority patent/DE1508633B1/en
Publication of GB1115441A publication Critical patent/GB1115441A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
    • B22D21/002—Castings of light metals
    • B22D21/007—Castings of light metals with low melting point, e.g. Al 659 degrees C, Mg 650 degrees C
    • 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
    • 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

Abstract

Moulds or cores for use in metal casting are formed from a composition containing calcium phosphate, the term "calcium phosphate" being used in the Specification to mean tri-calcium diorthophosphate, (Ca3(Po4)2) with or without other calcium phosphate materials. The proportion of calcium phosphate in the composition may vary from 100% to 20% by weight and hence up to 80% of the composition may comprise ingredients such as magnesium oxide, alumina, zircon, silica, zirconia, mullite molochite and sillimanite. Other substances useful as temporary binders, such as paraffin wax dissolved in trichlorethylene and aqueous ammonium alginate may be incorporated, The calcium phosphate may be chemically precipitated phosphate and/or bone ash phosphate and/or rock phosphate. The moulding composition may also be prepared with the use of sodium silicate, aluminium orthophosphate, ethyl silicate, a resin binder or other airdrying or baking binder. An example of the preparation of the moulding compositions comprises dry mixing 200 grams of chemically precipitated calcium phosphate of average particle size 0.5 microns with 800 grams of bone ash of average particle size 11.3 microns. 382 gms. of this powdered mixture was added to a mixture of 98 ml. of ethyl silicate, 2 ml. of piperidine, 17 ml. of isopropyl alcohol and 3 ml. of distilled water. The paste so formed was thoroughly mixed and rammed into a cavity to form a core in a mould.ALSO:In Example IV, a mould or core composition is prepared by dry mixing 200 g. of precipitated calcium phosphate of particle size 0.5 microns with 800 g. of bone ash of particle size 11.3 microns, plasticizing with water and ammonium alginate and extruding rods of 0.5 inch diameter and 10 inches long. The rods are air-dried and raised to 1250 DEG C. at 70 DEG C. per hour, kept at 1250 DEG C. for two hours and then cooled. The rods may be used as preformed cores in shell castings.
GB2306/65A 1965-01-19 1965-01-19 Improvements relating to the production of metal and alloy castings Expired GB1115441A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB2306/65A GB1115441A (en) 1965-01-19 1965-01-19 Improvements relating to the production of metal and alloy castings
US520397A US3473599A (en) 1965-01-19 1966-01-13 Production of metal castings
FR46369A FR1464455A (en) 1965-01-19 1966-01-18 Process improvements for the production of metal castings
DE19661508633 DE1508633B1 (en) 1965-01-19 1966-01-19 MOLDING COMPOUNDS FOR THE PRODUCTION OF SOLUBLE SHAPES AND CORES FOR METAL CASTING

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2306/65A GB1115441A (en) 1965-01-19 1965-01-19 Improvements relating to the production of metal and alloy castings

Publications (1)

Publication Number Publication Date
GB1115441A true GB1115441A (en) 1968-05-29

Family

ID=9737240

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2306/65A Expired GB1115441A (en) 1965-01-19 1965-01-19 Improvements relating to the production of metal and alloy castings

Country Status (4)

Country Link
US (1) US3473599A (en)
DE (1) DE1508633B1 (en)
FR (1) FR1464455A (en)
GB (1) GB1115441A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2122523A (en) * 1982-06-18 1984-01-18 Cosworth Res & Dev Ltd Casting non ferrous metals

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3794101A (en) * 1971-05-17 1974-02-26 J Frederick Method of casting metals in metal mold
US3787900A (en) * 1971-06-09 1974-01-29 Univ Iowa State Res Found Artificial bone or tooth prosthesis material
US3722574A (en) * 1971-06-29 1973-03-27 United Aircraft Corp Process of making magnesium oxide cores
US3701379A (en) * 1971-07-06 1972-10-31 United Aircraft Corp Process of casting utilizing magnesium oxide cores
US3968828A (en) * 1973-11-14 1976-07-13 Ashland Oil, Inc. Method of casting non-ferrous alloys
GB1546372A (en) * 1975-04-10 1979-05-23 Nat Res Dev Hardenable compositions
US4073662A (en) * 1977-03-09 1978-02-14 General Electric Company Method for removing a magnesia doped alumina core material
US4134777A (en) * 1977-10-06 1979-01-16 General Electric Company Method for rapid removal of cores made of Y2 O3 from directionally solidified eutectic and superalloy materials
US4239954A (en) * 1978-12-11 1980-12-16 United Technologies Corporation Backer for electron beam hole drilling
US5298200A (en) * 1987-11-18 1994-03-29 G-C Dental Industrial Corp. Dental refractory model materials
DE102019116406A1 (en) 2019-06-17 2020-12-17 HÜTTENES-ALBERTUS Chemische Werke Gesellschaft mit beschränkter Haftung Additive mixture for molding material mixtures for the production of waterglass-bound foundry molds and foundry cores

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1544929A (en) * 1922-12-01 1925-07-07 Doehler Die Casting Co Method of casting
US2086653A (en) * 1932-01-25 1937-07-13 Allis Chalmers Mfg Co Method of hydraulic cleaning of castings
US2023957A (en) * 1934-02-01 1935-12-10 American Metal Co Ltd Method of casting phosphorized copper
US2181004A (en) * 1936-01-11 1939-11-21 Borden Co Foundry core binder
US2116207A (en) * 1936-11-13 1938-05-03 American Smelting Refining Method of casting copper
CH246046A (en) * 1943-02-10 1946-12-15 Margot Leon Method for molding metal parts and foundry core for the implementation of this method.
US2479504A (en) * 1943-07-12 1949-08-16 Ransom & Randolph Company Investment material
US2368296A (en) * 1943-10-29 1945-01-30 Allis Louis Co Rotor construction
US2522548A (en) * 1946-10-03 1950-09-19 Thoger G Jungersen Method of making a phosphate gel and mold with phosphate gel binder
US2618530A (en) * 1949-06-18 1952-11-18 Aluminum Co Of America Mold coating
US2680890A (en) * 1950-03-02 1954-06-15 Ransom And Randolph Company Refractory investment and mold
US2879169A (en) * 1955-04-21 1959-03-24 Monsanto Chemicals Mold dressing for casting non-ferrous metals
BE560558A (en) * 1956-09-05
US3356129A (en) * 1964-06-30 1967-12-05 Schmidt Gmbh Karl Process of casting metals by use of water-soluble salt cores

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2122523A (en) * 1982-06-18 1984-01-18 Cosworth Res & Dev Ltd Casting non ferrous metals

Also Published As

Publication number Publication date
FR1464455A (en) 1966-12-30
US3473599A (en) 1969-10-21
DE1508633B1 (en) 1969-09-25

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