GB1358641A - Producing foundry moulds and cores - Google Patents

Producing foundry moulds and cores

Info

Publication number
GB1358641A
GB1358641A GB3872872A GB3872872A GB1358641A GB 1358641 A GB1358641 A GB 1358641A GB 3872872 A GB3872872 A GB 3872872A GB 3872872 A GB3872872 A GB 3872872A GB 1358641 A GB1358641 A GB 1358641A
Authority
GB
United Kingdom
Prior art keywords
hardening
weight
organic binder
sand
mixture
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
GB3872872A
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 GB3872872A priority Critical patent/GB1358641A/en
Publication of GB1358641A publication Critical patent/GB1358641A/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
    • B22C1/167—Mixtures of inorganic and organic binding agents

Landscapes

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

Abstract

1358641 Foundry mould compositions TSENTRALNY NAUCHNO - ISSLEDOVATELSKY INSTITUT TEKHNOLOGII MASHINOSTROENIA 18 Aug 1972 38728/72 Heading C3N A self-hardening moulding mixture for the production of foundry moulds and cores comprises sand, an organic binder, and a particulate hardening agent containing 40-98% by weight of tricalcium aluminate, the hardening agent consisting of compounds which can be considered as notionally containing CaO and Al 2 O 3 in a molar proportion of 1À6 : 1-4 : 1 and impurities which do not interfere with the hardening of the mixture. The organic binder may be a lignosulphonate of an alkali metal, alkaline earth metal or ammonium; a soluble tar obtained in pyrolysis of wood pulp and treated with lime; or dextrin. Sulphite alcohol waste liquor is preferably used as the lignosulphonate containing material. The hardening agent is preferably used in an amount 3-12% by weight of the organic binder. The mixture may also contain a foaming agent, preferably in an amount 0À1-0À6% of the weight of the sand. The sand is preferably quartz.
GB3872872A 1972-08-18 1972-08-18 Producing foundry moulds and cores Expired GB1358641A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3872872A GB1358641A (en) 1972-08-18 1972-08-18 Producing foundry moulds and cores

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3872872A GB1358641A (en) 1972-08-18 1972-08-18 Producing foundry moulds and cores

Publications (1)

Publication Number Publication Date
GB1358641A true GB1358641A (en) 1974-07-03

Family

ID=10405327

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3872872A Expired GB1358641A (en) 1972-08-18 1972-08-18 Producing foundry moulds and cores

Country Status (1)

Country Link
GB (1) GB1358641A (en)

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Legal Events

Date Code Title Description
PS Patent sealed
429A Application made for amendment of specification (sect. 29/1949)
429H Application (made) for amendment of specification now open to opposition (sect. 29/1949)
429A Application made for amendment of specification (sect. 29/1949)
PCNP Patent ceased through non-payment of renewal fee