GB987768A - Improvements in and relating to moulds - Google Patents

Improvements in and relating to moulds

Info

Publication number
GB987768A
GB987768A GB1653962A GB1653962A GB987768A GB 987768 A GB987768 A GB 987768A GB 1653962 A GB1653962 A GB 1653962A GB 1653962 A GB1653962 A GB 1653962A GB 987768 A GB987768 A GB 987768A
Authority
GB
United Kingdom
Prior art keywords
alumina
refractory material
stuccoing
silicate
expendable pattern
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
GB1653962A
Inventor
Frank Robert Sutherland
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.)
Union Carbide Corp
Original Assignee
Union Carbide Corp
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 Union Carbide Corp filed Critical Union Carbide Corp
Priority to GB1653962A priority Critical patent/GB987768A/en
Publication of GB987768A publication Critical patent/GB987768A/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
    • B22C1/165—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

Landscapes

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

Abstract

A multi-layer shell mould is made by first coating an expendable pattern with a first solution containing at least 40% by volume of sodium silicate and having dispersed therein a finely-comminuted refractory material; stuccoing said coated expendable pattern with a granular refractory material; then alternately applying coatings of a second solution and a stuccoing of a coarser granular refractory material, the second solution containing 31-69% by weight of ethyl silicate and having dispersed therein a finely-comminuted refractory material; and finally firing the multi-coated expendable pattern. In two modifications either the first or the second solution may be used alone throughout. The specified first solutions contain in various proportions sodium silicate, water, wetting agent, octyl alcohol, clay and alumina, and the specified second solutions contain ethyl silicate, isopropyl alcohol, water, concentrated hydrochloric acid, alumina, wetting agent, and either grog or boro-silicate glass grains. The stuccoing materials may be grains of boro-silicate glass, mullite, sillimanite, alumina, grog (a high alumina refractory), "Nalcast" (Registered Trade Mark) and zircon sand, the materials for the initial and subsequent stuccoings being of different grain sizes.ALSO:A method for making a multi-layer shell mould comprises first coating an expendable pattern with a first solution containing at least 40% by volume of sodium silicate and having dispersed therein a finely-comminuted refractory material; stuccoing said coated expendable pattern with a granular refractory material; then alternately applying coatings of a second solution and a stuccoing of a coarser granular refractory material, the second solution containing 31-69% by weight of sodium silicate and having dispersed therein a finely-comminuted refractory material; and finally firing the multi-coated expendable pattern. In two modifications either the first or the second solution may be used alone throughout. The specified first solutions contain in various proportions sodium silicate, water, wetting agent, octyl alcohol, clay and alumina, and the specified second solutions contain ethyl silicate, isopropyl alcohol, water, concentrated hydrochloric acid, alumina, wetting agent, and either grog or boro-silicate glass grains. The stuccoing materials may be grains of boro-silicate glass, mullite, sillimanite, alumina, grog (a high alumina refractory), "Nalcast" (Registered Trade Mark), and zircon sand, the materials for the initial and subsequent stuccoings being of different grain sizes.
GB1653962A 1962-05-01 1962-05-01 Improvements in and relating to moulds Expired GB987768A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1653962A GB987768A (en) 1962-05-01 1962-05-01 Improvements in and relating to moulds

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1653962A GB987768A (en) 1962-05-01 1962-05-01 Improvements in and relating to moulds

Publications (1)

Publication Number Publication Date
GB987768A true GB987768A (en) 1965-03-31

Family

ID=10079132

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1653962A Expired GB987768A (en) 1962-05-01 1962-05-01 Improvements in and relating to moulds

Country Status (1)

Country Link
GB (1) GB987768A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3115220A1 (en) * 2020-10-15 2022-04-22 Safran Foundry shell mold for metal parts

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3115220A1 (en) * 2020-10-15 2022-04-22 Safran Foundry shell mold for metal parts

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