GB669130A - Improvements in precision casting - Google Patents

Improvements in precision casting

Info

Publication number
GB669130A
GB669130A GB2179049A GB2179049A GB669130A GB 669130 A GB669130 A GB 669130A GB 2179049 A GB2179049 A GB 2179049A GB 2179049 A GB2179049 A GB 2179049A GB 669130 A GB669130 A GB 669130A
Authority
GB
United Kingdom
Prior art keywords
refractory
coating
silicate
pattern
suspended
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
GB2179049A
Inventor
Adam Dunlop
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
Application filed by Rolls Royce PLC filed Critical Rolls Royce PLC
Priority to GB2179049A priority Critical patent/GB669130A/en
Publication of GB669130A publication Critical patent/GB669130A/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
    • B22C9/02—Sand moulds or like moulds for shaped castings
    • B22C9/04—Use of lost patterns
    • 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
    • B22C1/165—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 in the manufacture of multilayered shell moulds

Abstract

669,130. Moulding processes; mould materials. ROLLS-ROYCE, Ltd. Aug. 22, 1950 [Aug. 22, 1949], No. 21790/49. Drawings to Specification. Class 83 (i). In a method of making a mould in which a wax pattern is invested in a refractory material and subsequently melted out, the pattern is given a coating of a fine refractory suspended in a silicate binding liquid without a hydrolysing agent followed by a coating of a refractory damped by a hydrolysing agent, which latter causes gelling of the silicate binder. The coating material containing no hydrolysing agent preferably comprises a fine refractory such as flint powder, alumina, sillimanite, zirconia or mixtures thereof suspended in ethyl silicate and a condensing agent such as piperidine or monoethanolamine. The second coating comprises a fine refractory such as fireclay grog wetted with a mixture of methylated spirits and water. When the ethyl silicate has gelled, the process may be repeated to build up a thicker layer on the pattern before the final investment in a water-borne refractory or in a suspension of a refractory in a liquid containing ethyl silicate and having a gelling time of about eight hours. Before the first-mentioned coating, the pattern may be sprayed with a mixture of fine refractory suspended in soap solution, sodium silicate and hydrochloric acid, the latter serving to condense the sodium silicate and bind the coating. After the wax pattern has been melted out, the mould is heated to approximately 1000‹ C. before casting. Specification 635,959 is referred to.
GB2179049A 1949-08-22 1949-08-22 Improvements in precision casting Expired GB669130A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2179049A GB669130A (en) 1949-08-22 1949-08-22 Improvements in precision casting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2179049A GB669130A (en) 1949-08-22 1949-08-22 Improvements in precision casting

Publications (1)

Publication Number Publication Date
GB669130A true GB669130A (en) 1952-03-26

Family

ID=10168848

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2179049A Expired GB669130A (en) 1949-08-22 1949-08-22 Improvements in precision casting

Country Status (1)

Country Link
GB (1) GB669130A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2806270A (en) * 1953-07-17 1957-09-17 Rolls Royce Method of making moulds for precision casting
US3690366A (en) * 1969-10-10 1972-09-12 Dentsply Research Dev Corp Production of molds
GB2152150A (en) * 1983-12-27 1985-07-31 Gen Electric Anti-icing inlet guide vane

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2806270A (en) * 1953-07-17 1957-09-17 Rolls Royce Method of making moulds for precision casting
US3690366A (en) * 1969-10-10 1972-09-12 Dentsply Research Dev Corp Production of molds
GB2152150A (en) * 1983-12-27 1985-07-31 Gen Electric Anti-icing inlet guide vane

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