GB1413779A - Self-hardening moulding mixture of making foundry moulds and cores - Google Patents

Self-hardening moulding mixture of making foundry moulds and cores

Info

Publication number
GB1413779A
GB1413779A GB2343274A GB2343274A GB1413779A GB 1413779 A GB1413779 A GB 1413779A GB 2343274 A GB2343274 A GB 2343274A GB 2343274 A GB2343274 A GB 2343274A GB 1413779 A GB1413779 A GB 1413779A
Authority
GB
United Kingdom
Prior art keywords
acid
weight
mixture
ferrous oxide
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
GB2343274A
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.)
TSNIITMASH
Original Assignee
TSNIITMASH
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 TSNIITMASH filed Critical TSNIITMASH
Priority to GB2343274A priority Critical patent/GB1413779A/en
Publication of GB1413779A publication Critical patent/GB1413779A/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
    • B22C1/18—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 inorganic agents

Landscapes

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

Abstract

1413779 Self-hardening mixture TSENTRALNY NAUCHNO - ISSLEDOVATELSKY INSTITUT TEKHNOLOGII MASHINOSTROENIA 24 May 1974 23432/74 Heading C3N A self-hardening moulding mixture for making foundry moulds and cores comprises: (a) moulding sand, (b) orthophosphoric acid, (c) ferrous oxide or a material containing ferrous oxide, and (d) one or more compounds, preferably in an amount 0.5-5% by weight of the moulding sand selected from (i) a water-soluble alkali-metal or ammonium salt of a carboxylic acid having a dissociation constant of not more than 10<SP>-4</SP>, (ii) a water-soluble alkali-metal or ammonium salt of an isopolyacid of a metal of chromium, molybdenum or tungsten, (iii) a manganese dioxide, or (iv) urea. Component (d)(i) may be an alkali metal or ammonium salt of citric acid, oxalic acid, acetic acid, tartaric acid, valeric acid, glycollic acid, butyric acid, formic acid or propionic acid. Component (d)(ii) is preferably an alkali metal or ammonium chromate, bichromate, tungstate, bitungstate, molybdate or bimolybdate. Component (d)(iii) may be manganese dioxide or a manganese dioxide-containing material, e.g. pyrolusite or ramsdellite, or manganic oxide or a manganic oxide-containing material, e.g. braunite. The sand may be quartz, olivine, zircon, chromemagnesite or chromite. The ferrous oxide containing material preferably comprises not less than 30% by weight ferrous oxide and may be ison scale having an FeO content of 48% by weight and a specific surface area of 1500 cm.<SP>2</SP>/g. The mixture may also contain a foaming agent suitably in an amount 0À1-1% by weight of the moulding sand. The foaming agent is preferably an alkyl aryl sulphonate, an alkyl sulphate or an alkyl sulphonate. As ingredient (b) use is preferably made of orthophosphoric acid having a concentration of 40-50% by weight in an amount 4-12% by weight. The mixture preferably comprises 2-6% by weight of ferrous oxide based on the moulding sand.
GB2343274A 1974-05-24 1974-05-24 Self-hardening moulding mixture of making foundry moulds and cores Expired GB1413779A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2343274A GB1413779A (en) 1974-05-24 1974-05-24 Self-hardening moulding mixture of making foundry moulds and cores

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2343274A GB1413779A (en) 1974-05-24 1974-05-24 Self-hardening moulding mixture of making foundry moulds and cores

Publications (1)

Publication Number Publication Date
GB1413779A true GB1413779A (en) 1975-11-12

Family

ID=10195526

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2343274A Expired GB1413779A (en) 1974-05-24 1974-05-24 Self-hardening moulding mixture of making foundry moulds and cores

Country Status (1)

Country Link
GB (1) GB1413779A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2122523A (en) * 1982-06-18 1984-01-18 Cosworth Res & Dev Ltd Casting non ferrous metals
WO2011075222A1 (en) 2009-12-16 2011-06-23 Ashland Lincesing And Intellectual Property Llc Foundry mixes containing an organic acid salt and their uses

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2122523A (en) * 1982-06-18 1984-01-18 Cosworth Res & Dev Ltd Casting non ferrous metals
WO2011075222A1 (en) 2009-12-16 2011-06-23 Ashland Lincesing And Intellectual Property Llc Foundry mixes containing an organic acid salt and their uses
EP2513006A4 (en) * 2009-12-16 2015-12-16 Ask Chemicals Lp Foundry mixes containing an organic acid salt and their uses

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Legal Events

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