GB1219527A - Improvements in or relating to investment casting - Google Patents

Improvements in or relating to investment casting

Info

Publication number
GB1219527A
GB1219527A GB4699469A GB4699469A GB1219527A GB 1219527 A GB1219527 A GB 1219527A GB 4699469 A GB4699469 A GB 4699469A GB 4699469 A GB4699469 A GB 4699469A GB 1219527 A GB1219527 A GB 1219527A
Authority
GB
United Kingdom
Prior art keywords
core
pattern
mould
pins
metal
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
GB4699469A
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.)
Northrop Grumman Space and Mission Systems Corp
Original Assignee
TRW Inc
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 to US76420868A priority Critical
Application filed by TRW Inc filed Critical TRW Inc
Publication of GB1219527A publication Critical patent/GB1219527A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C21/00Flasks; Accessories therefor
    • B22C21/12Accessories
    • B22C21/14Accessories for reinforcing or securing moulding materials or cores, e.g. gaggers, chaplets, pins, bars
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/02Sand moulds or like moulds for shaped castings
    • B22C9/04Use of lost patterns
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/10Cores; Manufacture or installation of cores
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49316Impeller making
    • Y10T29/49336Blade making
    • Y10T29/49337Composite blade

Abstract

1,219,527. Chaplets; core-supporting patterns; mould and core materials. T.R.W. Inc. 24 Sept., 1969 [1 Oct., 1968], No. 46994/69. Heading B3F. [Also in Divisions B5 and C3] A hollow casting is made by forming about a ceramic (fused silica) core 15, a low melting pattern 11 (of wax, polystyrene &c.) and then, to secure the core 15 against movement, pins 16, preferably heated, are inserted through the pattern 11 to engage the core surface before a ceramic shell mould 19 is formed around the pattern to anchor the pin ends while the pattern is melted out; molten metal is then poured into the cavity so created and the exposed parts of the pins 16, e.g. of the same metal, melt into the metal before it solidifies and the mould and core are removed. The shell mould 19 is formed by steps of dipping, dusting and drying (see Division B5).
GB4699469A 1968-10-01 1969-09-24 Improvements in or relating to investment casting Expired GB1219527A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US76420868A true 1968-10-01 1968-10-01

Publications (1)

Publication Number Publication Date
GB1219527A true GB1219527A (en) 1971-01-20

Family

ID=25070001

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4699469A Expired GB1219527A (en) 1968-10-01 1969-09-24 Improvements in or relating to investment casting

Country Status (3)

Country Link
US (1) US3596703A (en)
GB (1) GB1219527A (en)
SE (1) SE354210B (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2118078A (en) * 1982-04-12 1983-10-26 Howmet Turbine Components System for locating cores in casting molds
US4462453A (en) * 1979-06-04 1984-07-31 Deere & Company Casting methods with composite molded core assembly
GB2202772A (en) * 1987-03-25 1988-10-05 Ae Plc Improvements in or relating to supporting cores during investment casting
US5505250A (en) * 1993-08-23 1996-04-09 Rolls-Royce Plc Investment casting
GB2346340A (en) * 1999-02-03 2000-08-09 Rolls Royce Plc A ceramic core, a disposable pattern, a method of making a disposable pattern, a method of making a ceramic shell mould and a method of casting
EP1652603A3 (en) * 2004-10-29 2007-06-27 United Technologies Corporation Investment casting cores and methods
CN104722706A (en) * 2013-12-23 2015-06-24 东营市海河机械有限责任公司 Open-type wide-plane casting anti-swelling method and wax mold

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* Cited by examiner, † Cited by third party
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US3707152A (en) * 1971-01-18 1972-12-26 Ormco Corp Method of casting parts having dimensionally critical apertures
SE360813B (en) * 1971-03-15 1973-10-08 Saab Scania Ab
US3957104A (en) * 1974-02-27 1976-05-18 The United States Of America As Represented By The Administrator Of The United States National Aeronautics And Space Administration Method of making an apertured casting
GB2042648B (en) * 1979-02-24 1983-05-05 Rolls Royce Gas turbine engine hollow blades
GB2096525B (en) * 1981-04-14 1984-09-12 Rolls Royce Manufacturing gas turbine engine blades
GB2108879A (en) * 1981-08-12 1983-05-25 Rolls Royce Foundry machinery
US4617977A (en) * 1982-07-03 1986-10-21 Rolls-Royce Limited Ceramic casting mould and a method for its manufacture
US4596281A (en) * 1982-09-02 1986-06-24 Trw Inc. Mold core and method of forming internal passages in an airfoil
US4940074A (en) * 1986-06-30 1990-07-10 United Technologies Corporation Core pinning machine
GB2205261B (en) * 1987-06-03 1990-11-14 Rolls Royce Plc Method of manufacture and article manufactured thereby
US4861546A (en) * 1987-12-23 1989-08-29 Precision Castparts Corp. Method of forming a metal article from powdered metal
GB8800686D0 (en) * 1988-01-13 1988-02-10 Rolls Royce Plc Method of supporting core in mould
US4987944A (en) * 1989-11-13 1991-01-29 Pcc Airfoils, Inc. Method of making a turbine engine component
US5241738A (en) * 1991-03-21 1993-09-07 Howmet Corporation Method of making a composite casting
US5241737A (en) * 1991-03-21 1993-09-07 Howmet Corporation Method of making a composite casting
US5678298A (en) * 1991-03-21 1997-10-21 Howmet Corporation Method of making composite castings using reinforcement insert cladding
US5981083A (en) * 1993-01-08 1999-11-09 Howmet Corporation Method of making composite castings using reinforcement insert cladding
US5296308A (en) * 1992-08-10 1994-03-22 Howmet Corporation Investment casting using core with integral wall thickness control means
US5853044A (en) * 1996-04-24 1998-12-29 Pcc Airfoils, Inc. Method of casting an article
JPH1052736A (en) * 1996-08-09 1998-02-24 Honda Motor Co Ltd Manufacture of hollow casting with lost wax method
AT355918T (en) 1999-12-08 2007-03-15 Gen Electric Core for adjusting the wall thickness of a turbine blade and method
DE10236339B3 (en) * 2002-08-08 2004-02-19 Doncasters Precision Castings-Bochum Gmbh Method for manufacturing turbine blades with cooling ducts involves making ceramic core with positioning pins embedded in free end to protrude into surrounding moulding shell for removal during mechanical finishing of hardened blades
GB0226559D0 (en) * 2002-11-14 2002-12-18 Rolls Royce Plc Investment moulding process and apparatus
US6915840B2 (en) * 2002-12-17 2005-07-12 General Electric Company Methods and apparatus for fabricating turbine engine airfoils
EP1462195A1 (en) * 2003-03-25 2004-09-29 Claudius Peters Technologies GmbH Process for the manufacture of hollow grinding members and grinding members thus obtained
US7014424B2 (en) * 2003-04-08 2006-03-21 United Technologies Corporation Turbine element
US7172012B1 (en) * 2004-07-14 2007-02-06 United Technologies Corporation Investment casting
FR2896710B1 (en) * 2006-01-27 2009-10-30 Snecma Sa Process for manufacturing turbomachine component with cooling air exhaust orifices
US8336599B2 (en) * 2010-02-19 2012-12-25 Nuovo Pignone S.P.A. System and method for enhancing chaplet fusion
US8646511B2 (en) 2010-08-04 2014-02-11 Siemens Energy, Inc. Component with inspection-facilitating features
FR2978069B1 (en) * 2011-07-22 2013-09-13 Snecma Aircraft turbomachine piece mold comprising an improved insert support device for integrating the workpiece
EP3157694B1 (en) 2014-06-18 2020-07-29 Mikro Systems Inc. Turbine blade investment casting using film hole protrusions for integral wall thickness control
US10344597B2 (en) * 2015-08-17 2019-07-09 United Technologies Corporation Cupped contour for gas turbine engine blade assembly
US10099283B2 (en) 2015-12-17 2018-10-16 General Electric Company Method and assembly for forming components having an internal passage defined therein
US10118217B2 (en) 2015-12-17 2018-11-06 General Electric Company Method and assembly for forming components having internal passages using a jacketed core
US10046389B2 (en) 2015-12-17 2018-08-14 General Electric Company Method and assembly for forming components having internal passages using a jacketed core
US10099276B2 (en) 2015-12-17 2018-10-16 General Electric Company Method and assembly for forming components having an internal passage defined therein
US9987677B2 (en) 2015-12-17 2018-06-05 General Electric Company Method and assembly for forming components having internal passages using a jacketed core
US9968991B2 (en) 2015-12-17 2018-05-15 General Electric Company Method and assembly for forming components having internal passages using a lattice structure
US10099284B2 (en) 2015-12-17 2018-10-16 General Electric Company Method and assembly for forming components having a catalyzed internal passage defined therein
US10150158B2 (en) 2015-12-17 2018-12-11 General Electric Company Method and assembly for forming components having internal passages using a jacketed core
US10137499B2 (en) 2015-12-17 2018-11-27 General Electric Company Method and assembly for forming components having an internal passage defined therein
US9579714B1 (en) 2015-12-17 2017-02-28 General Electric Company Method and assembly for forming components having internal passages using a lattice structure
US10335853B2 (en) 2016-04-27 2019-07-02 General Electric Company Method and assembly for forming components using a jacketed core
US10286450B2 (en) 2016-04-27 2019-05-14 General Electric Company Method and assembly for forming components using a jacketed core
WO2018034826A1 (en) * 2016-08-18 2018-02-22 General Electric Company Method and assembly for a multiple component core assembly
US10391670B2 (en) * 2017-06-28 2019-08-27 General Electric Company Additively manufactured integrated casting core structure with ceramic shell
US20190001402A1 (en) * 2017-06-28 2019-01-03 General Electric Company Additively manufactured interlocking casting core structure with ceramic shell

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE470283C (en) * 1929-01-10 Louis Rettberg With resilient legs provided Kernstuetze
CA568678A (en) * 1959-01-06 A. Spitler Robert Bladed molds and method
US2096679A (en) * 1935-10-28 1937-10-19 Fanner Mfg Co Chaplet
US3401738A (en) * 1966-02-10 1968-09-17 United Aircraft Corp Core location in precision casting

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4462453A (en) * 1979-06-04 1984-07-31 Deere & Company Casting methods with composite molded core assembly
GB2118078A (en) * 1982-04-12 1983-10-26 Howmet Turbine Components System for locating cores in casting molds
US4487246A (en) * 1982-04-12 1984-12-11 Howmet Turbine Components Corporation System for locating cores in casting molds
GB2202772A (en) * 1987-03-25 1988-10-05 Ae Plc Improvements in or relating to supporting cores during investment casting
GB2202772B (en) * 1987-03-25 1991-05-01 Ae Plc Improvements in or relating to investment casting
US5505250A (en) * 1993-08-23 1996-04-09 Rolls-Royce Plc Investment casting
GB2346340A (en) * 1999-02-03 2000-08-09 Rolls Royce Plc A ceramic core, a disposable pattern, a method of making a disposable pattern, a method of making a ceramic shell mould and a method of casting
EP1652603A3 (en) * 2004-10-29 2007-06-27 United Technologies Corporation Investment casting cores and methods
US7673669B2 (en) 2004-10-29 2010-03-09 United Technologies Corporation Investment casting cores and methods
CN104722706A (en) * 2013-12-23 2015-06-24 东营市海河机械有限责任公司 Open-type wide-plane casting anti-swelling method and wax mold

Also Published As

Publication number Publication date
US3596703A (en) 1971-08-03
SE354210B (en) 1973-03-05

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