GB913637A - Metal casting process - Google Patents

Metal casting process

Info

Publication number
GB913637A
GB913637A GB415/60A GB41559A GB913637A GB 913637 A GB913637 A GB 913637A GB 415/60 A GB415/60 A GB 415/60A GB 41559 A GB41559 A GB 41559A GB 913637 A GB913637 A GB 913637A
Authority
GB
United Kingdom
Prior art keywords
mould
zircon
feldspar
coating
cluster
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
GB415/60A
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
Priority claimed from US708628A external-priority patent/US2961751A/en
Application filed by Howe Sound Co filed Critical Howe Sound Co
Publication of GB913637A publication Critical patent/GB913637A/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
    • 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)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mold Materials And Core Materials (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

A metal casting process comprises building up several stucco and dip coats of finely divided ceramic material on a disposable pattern, adding a final coating containing an inorganic material with a lower maturing temperature, heating the mould to dispose of the pattern, and finally pouring the metal. A cluster of wax patterns is first dipped and rotated in a composition consisting of colloidal silica zircon, water and sodium fluoride. The cluster is then allowed to drain in various positions, air pockets being removed by a stream of air. While the cluster is moved about, it is then coated with alundum following through a screen from a vibratory feeder. The cluster is dried and dipped a second time and coated with a coarser alundum stucco coat. After a further dipping, a tabular alumina coating is applied, and further coatings up to ten may be applied. One or more dips are then made in a composition containing feldspar, in addition to colloidal silica, zircon, water and sodium fluoride, with subsequent stucco coating. The mould is then dried in a dehumidified atmosphere. The face of the mould is ground flat to enable the metal to be poured by inversion and it is then fired at 1800 DEG F. at 3-30 mins. while allowing the patterns to flow out. A further eutectic coating containing feldspar is then added. The mould is finally pre-heated to 1600-2200 DEG F. clamped to the furnace, inverted and filled. The filling may take place under pressure and/or under a protective atmosphere. It may be cooled in a controlled atmosphere while surrounded with insulating material. The zircon in the dip may be replaced by flours of alumina, titania, silica, stabilized zircon, fused quartz, thoria, chromite, sillimanite, mullite, magnesia or glass. The mould may be wetted before each dip. The alundum stucco coat may be replaced by zircon, sillimanite, mullite, glass, thoria, chromite or magnesia. The eutectic feldspar vitrifies at 1000-2200 DEG F. and seals the mould pores. The feldspar coating may be an intermediate rather than an outside coating. The feldspar may be replaced by iron oxide, borax or stannous chloride. Specification 913,638 and U.S.A. Specifications 2,380,945, 2,439,207, 2,441,695, 2,521,839 and 2,806,271 are referred to.
GB415/60A 1958-01-13 1959-01-05 Metal casting process Expired GB913637A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US708628A US2961751A (en) 1958-01-13 1958-01-13 Ceramic metal casting process
US68075A US3196506A (en) 1958-01-13 1960-11-08 Method of making a shell mold by lost wax process

Publications (1)

Publication Number Publication Date
GB913637A true GB913637A (en) 1962-12-19

Family

ID=26748552

Family Applications (2)

Application Number Title Priority Date Filing Date
GB21456/60A Expired GB913638A (en) 1958-01-13 1959-01-05 A composition for use in a metal casting process
GB415/60A Expired GB913637A (en) 1958-01-13 1959-01-05 Metal casting process

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB21456/60A Expired GB913638A (en) 1958-01-13 1959-01-05 A composition for use in a metal casting process

Country Status (6)

Country Link
US (1) US3196506A (en)
CH (1) CH374150A (en)
DE (1) DE1185775B (en)
FR (1) FR1218110A (en)
GB (2) GB913638A (en)
NL (2) NL108616C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2677906A1 (en) * 1991-06-18 1992-12-24 Del Rabal Jean Claude Method for putting the mould for baking (firing) a casting into a furnace (oven)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3446266A (en) * 1962-12-28 1969-05-27 Precision Metalsmiths Inc Investment casting apparatus
US3654984A (en) * 1965-12-02 1972-04-11 Edward J Mellen Jr Porcupine shell molds and method of making same
US3824113A (en) * 1972-05-08 1974-07-16 Sherwood Refractories Method of coating preformed ceramic cores
US4526312A (en) * 1979-12-10 1985-07-02 Rockwell International Corporation Low cost method of making superplastically formed and diffusion bonded structures
US4789140A (en) * 1982-06-11 1988-12-06 Howmet Turbine Components Corporation Ceramic porous bodies suitable for use with superalloys
US4697632A (en) * 1982-06-11 1987-10-06 Howmet Turbine Components Corporation Ceramic porous bodies suitable for use with superalloys
DE4116609A1 (en) * 1991-01-19 1992-07-23 Thyssen Industrie METHOD FOR PRODUCING CERAMIC SHELLS AS CASTING FORM
US5607551A (en) * 1993-06-24 1997-03-04 Kimberly-Clark Corporation Soft tissue
US6019927A (en) * 1997-03-27 2000-02-01 Galliger; Nicholas Method of casting a complex metal part
US6845811B2 (en) * 2002-05-15 2005-01-25 Howmet Research Corporation Reinforced shell mold and method
US6648060B1 (en) * 2002-05-15 2003-11-18 Howmet Research Corporation Reinforced shell mold and method
US20040167270A1 (en) * 2003-02-25 2004-08-26 Dane Chang Fugitive pattern for casting
US7258158B2 (en) * 2004-07-28 2007-08-21 Howmet Corporation Increasing stability of silica-bearing material
CN102019361B (en) * 2009-09-15 2012-12-05 蔡欲期 Ceramic shell rapid drying method and ceramic shell
WO2012003439A1 (en) * 2010-07-02 2012-01-05 Mikro Systems, Inc. Self supporting core-in-a-core for casting
CN103506577B (en) * 2013-09-22 2015-02-11 苏州华宇精密铸造有限公司 Precision casting method of aluminum alloy cast
CN107225210A (en) * 2017-07-05 2017-10-03 天长市兴宇铸造有限公司 A kind of method for casting wax-pattern external paint and application coating progress molding shell

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT179853B (en) * 1945-08-31 1954-10-11 Nicolas Herzmark Goat mold for precision casting with refractory metals
US2682692A (en) * 1950-10-25 1954-07-06 Everard F Kohl Process of preparing precision castings
BE500159A (en) * 1950-11-28
US2806269A (en) * 1952-09-11 1957-09-17 Rolls Royce Moulds for precision casting
US2932864A (en) * 1958-06-17 1960-04-19 Mellen Method of making and drying shell-type refractory molds
US3132388A (en) * 1959-08-26 1964-05-12 Corning Glass Works Method of removing the pattern from a thin shell investment mold

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2677906A1 (en) * 1991-06-18 1992-12-24 Del Rabal Jean Claude Method for putting the mould for baking (firing) a casting into a furnace (oven)

Also Published As

Publication number Publication date
GB913638A (en) 1962-12-19
FR1218110A (en) 1960-05-09
NL235063A (en)
US3196506A (en) 1965-07-27
NL108616C (en)
CH374150A (en) 1963-12-31
DE1185775B (en) 1965-01-21

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