GB1000671A - Process for making cores and moulds - Google Patents

Process for making cores and moulds

Info

Publication number
GB1000671A
GB1000671A GB29484/63A GB2948463A GB1000671A GB 1000671 A GB1000671 A GB 1000671A GB 29484/63 A GB29484/63 A GB 29484/63A GB 2948463 A GB2948463 A GB 2948463A GB 1000671 A GB1000671 A GB 1000671A
Authority
GB
United Kingdom
Prior art keywords
binder
formaldehyde
sand
furfuryl alcohol
mix
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
GB29484/63A
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.)
Quaker Oats Co
Original Assignee
Quaker Oats 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
Application filed by Quaker Oats Co filed Critical Quaker Oats Co
Publication of GB1000671A publication Critical patent/GB1000671A/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
    • B22C1/22—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 resins or rosins
    • B22C1/2233—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 resins or rosins obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • B22C1/224—Furan polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C23/00—Tools; Devices not mentioned before for moulding

Landscapes

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

Abstract

A process for the high-speed production of foundry cores and moulds comprises: (i) mixing 94 to 99.5 parts (by weight) of foundry sand with 0.5 to 6 parts of a binder, which comprises 5 to 40% of one or more boron oxides and/or acids and a liquid resin component comprising at least 15% furfuryl alcohol monomer and a furfuryl alcohol-formaldehyde resin and/or formaldehyde, the maximum amount of free and combined formaldehyde being 30% and the minimum 2% when 0.5 to 15% of an acid catalyst is included and 12% otherwise, to distribute the binder uniformly on the sand; (ii) applying the mix to a shaped surface heated to 350 DEG to 600 DEG F.; (iii) leaving the mix in contact with the surface long enough to form a self-supporting shape; (iv) separating the shape; and (v) allowing cure to proceed at ambient temperature. Polymers of formaldehyde and/or of furfuryl alcohol may also be included in the binder. The sand and binder should be substantially dry. Examples illustrate the use of various binders according to the invention and include comparative data for conventional binders.
GB29484/63A 1963-02-05 1963-07-25 Process for making cores and moulds Expired GB1000671A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US256408A US3216075A (en) 1963-02-05 1963-02-05 Method for manufacturing foundry cores and molds

Publications (1)

Publication Number Publication Date
GB1000671A true GB1000671A (en) 1965-08-11

Family

ID=22972124

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29484/63A Expired GB1000671A (en) 1963-02-05 1963-07-25 Process for making cores and moulds

Country Status (9)

Country Link
US (1) US3216075A (en)
AT (1) AT251778B (en)
BE (1) BE643423A (en)
BR (1) BR6351234D0 (en)
CH (1) CH458637A (en)
ES (1) ES296046A1 (en)
GB (1) GB1000671A (en)
LU (1) LU45330A1 (en)
NL (1) NL295300A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3409582A (en) * 1964-04-22 1968-11-05 Quaker Oats Co Alkaline refractory mixtures containing formaldehyde-furylethylenealdehyde resins and gunning therewith
US3386016A (en) * 1965-08-02 1968-05-28 Sprague Electric Co Field effect transistor with an induced p-type channel by means of high work function metal or oxide
FR2457753A1 (en) * 1979-05-28 1980-12-26 Inventa Ag Porous resin bonded moulds for ceramics - mfd. by consolidating in hot mould and then completely curing outside mould
DE3411827A1 (en) * 1984-03-30 1985-10-10 Rütgerswerke AG, 6000 Frankfurt TARDABLE MOLDS AND THEIR USE
EP0739257A4 (en) * 1994-01-12 2002-04-03 Ashland Inc Heat cured foundry binders and their use
PL3495073T3 (en) * 2010-12-16 2020-11-30 HÜTTENES-ALBERTUS Chemische Werke Gesellschaft mit beschränkter Haftung Low emission cold curing binders for foundry industry
CN114082900A (en) * 2021-11-25 2022-02-25 中车大连机车车辆有限公司 Manufacturing process of locomotive coupler knuckle coated sand core
WO2023183192A1 (en) * 2022-03-22 2023-09-28 ASK Chemicals LLC Boric acid as a curing adjuvant in a warm box process

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA573760A (en) * 1959-04-07 E. Freeman Stephen Method and compositions for the production of foundry cores
FR1039017A (en) * 1950-07-04 1953-10-05 Terni Process for the preparation of binders for sands and foundry earths based on synthetic furfurilic resins
US2999829A (en) * 1954-06-25 1961-09-12 Leo H Treat Aqueous shell molding composition comprising maleic acid, furfuryl alcohol, and urea
US2874148A (en) * 1954-07-29 1959-02-17 Quaker Oats Co Resinification of furfuryl alcohol and formaldehyde at high hydrogen-ion concentrations
US3145438A (en) * 1958-09-18 1964-08-25 Archer Daniels Midland Co Gas cure of organic bonds for sand and abrasive granules
US3008205A (en) * 1958-09-19 1961-11-14 Gen Motors Corp Shell type molds and cores
US3024215A (en) * 1960-06-27 1962-03-06 Freeman Chemical Corp Foundry composition containing furfuryl alcohol polymer, foundry structure thereof, and method of making same

Also Published As

Publication number Publication date
AT251778B (en) 1967-01-25
BE643423A (en) 1964-08-05
US3216075A (en) 1965-11-09
ES296046A1 (en) 1964-07-16
CH458637A (en) 1968-06-30
LU45330A1 (en) 1965-01-31
NL295300A (en)
BR6351234D0 (en) 1973-06-26

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