GB1125124A - Improved mould and methods for its production and for its use in precision casting - Google Patents

Improved mould and methods for its production and for its use in precision casting

Info

Publication number
GB1125124A
GB1125124A GB3961165A GB3961165A GB1125124A GB 1125124 A GB1125124 A GB 1125124A GB 3961165 A GB3961165 A GB 3961165A GB 3961165 A GB3961165 A GB 3961165A GB 1125124 A GB1125124 A GB 1125124A
Authority
GB
United Kingdom
Prior art keywords
graphite
pattern
mould
flour
dip
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
GB3961165A
Inventor
Nick George Lirones
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.)
Howe Sound Co
Original Assignee
Howe Sound 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 Howe Sound Co filed Critical Howe Sound Co
Publication of GB1125124A publication Critical patent/GB1125124A/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

1,125,124. Graphite casting moulds. HOWE SOUND CO.-SUPERALLOY GROUP. 16 Sept., 1965, No. 39611/65. Heading B3F. [Also in Division B5] In a method of making a mould using a disposable, e.g. wax pattern, the pattern is wetted by dip coating with an aqueous solution of solids comprising graphite flour and colloidal graphite and whilst still wet the coating is covered by a stucco of graphite particles, the sequence being repeated until a desired wall thickness has been built up. Alternatively after the first few graphite dip coats and stuccoing, the pattern may be wetted with a ceramic dip coating comprising a binder and a ceramic flour and stucco until the wall thickness has been built up. At least half the wall thickness may be formed by the ceramic coating. A suitable dip coat composition comprises colloidal graphite having a particle size less than 1 micron, graphite flour having a particle size less than 200 mesh, the colloidal graphite being present by weight from 0.5 to 10% of the total colloidal graphite and graphite flour, an emulsifying agent e.g. gum tragacanth, or other hydrophillic colloid such as gum gelatins, alginates and an anionic wetting agent, e.g. sodium heptadecyl sulphate. The graphite stucco added to the dip coated pattern has a particle size less than 35 mesh but more than 150 mesh. When the mould is formed the wax pattern is removed by heating in an oven or steam chamber or by steam jet and the mould is then fired at a temperature above 800‹ F. Firing and dewaxing the pattern may be carried out concurrently, the firing of the mould being carried out in an inert and preferably reducing atmosphere.
GB3961165A 1965-09-06 1965-09-16 Improved mould and methods for its production and for its use in precision casting Expired GB1125124A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE669235A BE669235A (en) 1965-09-06 1965-09-06

Publications (1)

Publication Number Publication Date
GB1125124A true GB1125124A (en) 1968-08-28

Family

ID=3847885

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3961165A Expired GB1125124A (en) 1965-09-06 1965-09-16 Improved mould and methods for its production and for its use in precision casting

Country Status (2)

Country Link
BE (1) BE669235A (en)
GB (1) GB1125124A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2126148A (en) * 1982-02-18 1984-03-21 Rolls Royce Mould making
CN102527936A (en) * 2012-01-19 2012-07-04 沈阳铸造研究所 Graphite mould casting method for precise forming of low expansion alloy
WO2024050924A1 (en) * 2022-09-09 2024-03-14 华能国际电力股份有限公司 Anti-oxidation dipping treatment method for graphite sealing element for thermal power generation unit, and anti-oxidation production line

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2126148A (en) * 1982-02-18 1984-03-21 Rolls Royce Mould making
CN102527936A (en) * 2012-01-19 2012-07-04 沈阳铸造研究所 Graphite mould casting method for precise forming of low expansion alloy
CN102527936B (en) * 2012-01-19 2013-04-10 沈阳铸造研究所 Graphite mould casting method for precise forming of low expansion alloy
WO2024050924A1 (en) * 2022-09-09 2024-03-14 华能国际电力股份有限公司 Anti-oxidation dipping treatment method for graphite sealing element for thermal power generation unit, and anti-oxidation production line

Also Published As

Publication number Publication date
BE669235A (en) 1966-03-07

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