GB577243A - Improvements in and relating to refractory moulds - Google Patents

Improvements in and relating to refractory moulds

Info

Publication number
GB577243A
GB577243A GB675944A GB675944A GB577243A GB 577243 A GB577243 A GB 577243A GB 675944 A GB675944 A GB 675944A GB 675944 A GB675944 A GB 675944A GB 577243 A GB577243 A GB 577243A
Authority
GB
United Kingdom
Prior art keywords
sillimanite
mould
kyanite
casting
relating
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
GB675944A
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.)
A H TAGGETT Ltd
STEPHEN GEORGE KILLICK
Original Assignee
A H TAGGETT Ltd
STEPHEN GEORGE KILLICK
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 A H TAGGETT Ltd, STEPHEN GEORGE KILLICK filed Critical A H TAGGETT Ltd
Priority to GB675944A priority Critical patent/GB577243A/en
Publication of GB577243A publication Critical patent/GB577243A/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
    • B22C1/02—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
    • B22C1/08—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives for decreasing shrinkage of the mould, e.g. for investment casting
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/16—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay
    • C04B35/18—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay rich in aluminium oxide

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mold Materials And Core Materials (AREA)

Abstract

To compensate for shrinkage of a "porcelain" artificial tooth &c. on firing, the mould in which it is formed is made of Kyanite and Sillimanite in predetermined proportions so that it can be permanently expanded to the required extent by heat. Kyanite increases 20 per cent in volume, becoming Sillimanite, when heated to 1350 DEG C. and mixtures with Sillimanite expand to a proportionally smaller extent. Kaolin, bentonite, sodium silicate, silicon ester, plaster of Paris, phosphates, &c. may be used for bonding, and casting may be done while the mould is still hot, e.g. at 800 DEG C. The mould may be made by pressing about a pattern or by the "lost wax" process and may be used for casting under pressure.
GB675944A 1944-04-12 1944-04-12 Improvements in and relating to refractory moulds Expired GB577243A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB675944A GB577243A (en) 1944-04-12 1944-04-12 Improvements in and relating to refractory moulds

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB675944A GB577243A (en) 1944-04-12 1944-04-12 Improvements in and relating to refractory moulds

Publications (1)

Publication Number Publication Date
GB577243A true GB577243A (en) 1946-05-10

Family

ID=9820254

Family Applications (1)

Application Number Title Priority Date Filing Date
GB675944A Expired GB577243A (en) 1944-04-12 1944-04-12 Improvements in and relating to refractory moulds

Country Status (1)

Country Link
GB (1) GB577243A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2715314A1 (en) * 1976-05-24 1977-12-08 Pre Vest Inc MATERIALS FOR THE PRODUCTION OF MOLDS FOR PRECISION CASTING

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2715314A1 (en) * 1976-05-24 1977-12-08 Pre Vest Inc MATERIALS FOR THE PRODUCTION OF MOLDS FOR PRECISION CASTING

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