GB1409794A - Core for use in casting metals and a method of producing cored castings - Google Patents

Core for use in casting metals and a method of producing cored castings

Info

Publication number
GB1409794A
GB1409794A GB4139372A GB4139372A GB1409794A GB 1409794 A GB1409794 A GB 1409794A GB 4139372 A GB4139372 A GB 4139372A GB 4139372 A GB4139372 A GB 4139372A GB 1409794 A GB1409794 A GB 1409794A
Authority
GB
United Kingdom
Prior art keywords
core
polysiloxane
tyler
mesh
graphite
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
GB4139372A
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.)
Howmet Corp
Original Assignee
Howmet 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 Howmet Corp filed Critical Howmet Corp
Publication of GB1409794A publication Critical patent/GB1409794A/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
    • B22C1/20—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 of organic agents
    • B22C1/205—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 of organic agents of organic silicon or metal compounds, other organometallic compounds

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Inorganic Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Mold Materials And Core Materials (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

1409794 Graphite compositions HOWMET CORP 6 Sept 1972 [17 Sept 1971] 41393/72 Heading C1A [Also in Division C3] A core for use in the casting of metals is formed by moulding a composition containing graphite, a polysiloxane and a catalyst for curing the polysiloxane to a pre-formed core configuration, curing, baking and firing the pre-formedcored configuration to convert the polysiloxane to a siliceous material to bond the filler together and define a dimensionally stable core. Suitable catalysts include zinc acetate, lead stearate, lead 2-ethylhexoate, calcium stearate, dibutyl triacetate, stannous octoate, lead oxide, zinc oxide, benzyltrimethyl ammonium 2-ethyl hexoate, tetramethyl ammonium acetate and benzoyl peroxide. In the specific Examples 9 and 10 where graphite is used it may be all of size -200 mesh (Tyler) or a mixture of -200 mesh (Tyler) flour and 30-100 mesh (Tyler) particles. The composition is formed into the desired core shapes and heated, suitably at 100‹ F. per hour to 1200‹ F., which temperature may be maintained for 4 hours; thereafter the core is heated at 100‹ F. per hour until the core reaches 2050‹ F. and is held at this temperature to complete the baking and firing cycle and convert the polysiloxane to a siliceous material to bond the ceramic filler particles together.
GB4139372A 1971-09-17 1972-09-06 Core for use in casting metals and a method of producing cored castings Expired GB1409794A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US18146371A 1971-09-17 1971-09-17

Publications (1)

Publication Number Publication Date
GB1409794A true GB1409794A (en) 1975-10-15

Family

ID=22664378

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4139372A Expired GB1409794A (en) 1971-09-17 1972-09-06 Core for use in casting metals and a method of producing cored castings

Country Status (5)

Country Link
JP (1) JPS4861324A (en)
CA (1) CA1008223A (en)
FR (1) FR2153014B1 (en)
GB (1) GB1409794A (en)
IT (1) IT967565B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2231055A (en) * 1987-12-19 1990-11-07 Sankin Ind Co Dental cement
EP1930095A3 (en) * 2006-12-06 2008-06-18 General Electric Company Casting compositions for manufacturing metal casting and methods of manufacturing thereof
US9863254B2 (en) 2012-04-23 2018-01-09 General Electric Company Turbine airfoil with local wall thickness control

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2569586B1 (en) * 1984-09-06 1986-09-12 Snecma PROCESS FOR THE PREPARATION OF FOUNDRY CORES AND CERAMIC COMPOSITION FOR USE IN CARRYING OUT SAID PROCESS
FR2615423B1 (en) * 1987-05-19 1990-04-13 Fm Ind FOUNDRY SAND PROCESSING PROCESS USED IN THE CONSUMABLE MODEL CASTING METHOD

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2231055A (en) * 1987-12-19 1990-11-07 Sankin Ind Co Dental cement
GB2231055B (en) * 1987-12-19 1991-12-04 Sankin Ind Co A dental cement
EP1930095A3 (en) * 2006-12-06 2008-06-18 General Electric Company Casting compositions for manufacturing metal casting and methods of manufacturing thereof
US9863254B2 (en) 2012-04-23 2018-01-09 General Electric Company Turbine airfoil with local wall thickness control

Also Published As

Publication number Publication date
JPS4861324A (en) 1973-08-28
FR2153014A1 (en) 1973-04-27
FR2153014B1 (en) 1977-07-22
IT967565B (en) 1974-03-11
CA1008223A (en) 1977-04-12
DE2244954B2 (en) 1975-05-22
DE2244954A1 (en) 1973-04-12

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee