GB753228A - Moulds for precision casting of metal - Google Patents

Moulds for precision casting of metal

Info

Publication number
GB753228A
GB753228A GB2272253A GB2272253A GB753228A GB 753228 A GB753228 A GB 753228A GB 2272253 A GB2272253 A GB 2272253A GB 2272253 A GB2272253 A GB 2272253A GB 753228 A GB753228 A GB 753228A
Authority
GB
United Kingdom
Prior art keywords
added
liquid
acid
silica
alkali metal
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
GB2272253A
Inventor
Harold Garton Emblem
Desmond Joseph Cloherty
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.)
Rolls Royce PLC
Original Assignee
Rolls Royce PLC
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
Priority to BE534450D priority Critical patent/BE534450A/xx
Application filed by Rolls Royce PLC filed Critical Rolls Royce PLC
Priority to GB2272253A priority patent/GB753228A/en
Priority to CH329455D priority patent/CH329455A/en
Publication of GB753228A publication Critical patent/GB753228A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B22C1/183—Sols, colloids or hydroxide gels
    • 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
    • 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
    • B22C9/04—Use of lost patterns

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Mold Materials And Core Materials (AREA)

Abstract

A method of forming a mould or core for precision casting of hollow turbine blades &c. consists in adding an aqueous solution of an alkali metal silicate to an excess of an aqueous solution of a mineral acid, mixing with the acid reaction products so formed a stable substantially electrolyte-free colloidal dispersion of silica in water and using the resultant liquid to bind a refractory mould material, such as mullite, sillimanite, calcined kaolin or fireclay grog, with zircon or zirconia. Wetting agents and/or foam inhibitors may be added. Thus, a diluted sodium silicate solution is mixed with dilute nitric acid, and ethyl hexanol as a foam inhibitor and "Teepol" (R.T.M.) as a wetting agent are added. The liquid is further acidified by adding concentrated hydrochloric acid and the colloidal dispersion of silica in water is then added immediately. The resulting liquid is added to equal parts by weight of zircon sand and calcined kaolin. The Provisional Specification describes also the use of other alkali metal or ammonium silicates in place of sodium or potassium silicate.
GB2272253A 1953-08-18 1953-08-18 Moulds for precision casting of metal Expired GB753228A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE534450D BE534450A (en) 1953-08-18
GB2272253A GB753228A (en) 1953-08-18 1953-08-18 Moulds for precision casting of metal
CH329455D CH329455A (en) 1953-08-18 1954-08-11 Process for the production of a casting mold for precision casting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2272253A GB753228A (en) 1953-08-18 1953-08-18 Moulds for precision casting of metal

Publications (1)

Publication Number Publication Date
GB753228A true GB753228A (en) 1956-07-18

Family

ID=10184049

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2272253A Expired GB753228A (en) 1953-08-18 1953-08-18 Moulds for precision casting of metal

Country Status (3)

Country Link
BE (1) BE534450A (en)
CH (1) CH329455A (en)
GB (1) GB753228A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2851752A (en) * 1957-04-08 1958-09-16 Gen Motors Corp High strength investment casting mold
US3077413A (en) * 1957-02-27 1963-02-12 Carborundum Co Ceramic fiber products and method and apparatus for manufacture thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3077413A (en) * 1957-02-27 1963-02-12 Carborundum Co Ceramic fiber products and method and apparatus for manufacture thereof
US2851752A (en) * 1957-04-08 1958-09-16 Gen Motors Corp High strength investment casting mold

Also Published As

Publication number Publication date
CH329455A (en) 1958-04-30
BE534450A (en)

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