GB927978A - Manufacture of foundry moulds and cores - Google Patents

Manufacture of foundry moulds and cores

Info

Publication number
GB927978A
GB927978A GB43683/61A GB4368361A GB927978A GB 927978 A GB927978 A GB 927978A GB 43683/61 A GB43683/61 A GB 43683/61A GB 4368361 A GB4368361 A GB 4368361A GB 927978 A GB927978 A GB 927978A
Authority
GB
United Kingdom
Prior art keywords
urea
proportion
formaldehyde
weight
cores
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
GB43683/61A
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.)
Motors Liquidation Co
Original Assignee
Motors Liquidation 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 Motors Liquidation Co filed Critical Motors Liquidation Co
Publication of GB927978A publication Critical patent/GB927978A/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
    • B22C1/2246—Condensation polymers of aldehydes and ketones
    • 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
    • B22C1/02—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives

Landscapes

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

Abstract

Compositions for making foundry moulds and cores comprise sand, and an aqueous solution of urea and formaldehyde. The proportion of urea to formaldehyde is in the mole ratio of 1:2 to 2,6, the urea and formaldehyde together are present in a proportion of 0,5 to 3,0% by weight of the sand and the water is present in a proportion of 1,5 to 3,5% by weight of the mixture. Optional additives include mould release agents such as naphthalene, chlorinated naphthalene and camphor which may be dissolved in kerosene and green strength additives such as cereal flours, bentonite clays, silica flour and fly ash. Curing agents, e.g. ammonium chloride, ammonium sulphate and oxalic acid may also be included.
GB43683/61A 1960-12-27 1961-12-06 Manufacture of foundry moulds and cores Expired GB927978A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US78653A US3138836A (en) 1960-12-27 1960-12-27 Foundry molds and cores and process for making same

Publications (1)

Publication Number Publication Date
GB927978A true GB927978A (en) 1963-06-06

Family

ID=22145421

Family Applications (1)

Application Number Title Priority Date Filing Date
GB43683/61A Expired GB927978A (en) 1960-12-27 1961-12-06 Manufacture of foundry moulds and cores

Country Status (2)

Country Link
US (1) US3138836A (en)
GB (1) GB927978A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1043176A (en) * 1963-11-04 1966-09-21 Foseco Int Production of metal ingots, slabs and billets
US3362463A (en) * 1964-10-02 1968-01-09 Manginelli Ralph Method of making a porous investment mold
US4381354A (en) * 1981-02-23 1983-04-26 Asahi Yukizai Kogyo Co., Ltd. Resin coated sand and casting molds prepared therefrom

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2422118A (en) * 1942-03-13 1947-06-10 Libbey Owens Ford Glass Co Making cores for casting light metal alloys
US2534806A (en) * 1947-07-18 1950-12-19 Behr Manning Corp Coated abrasive articles
US2683296A (en) * 1951-11-17 1954-07-13 Monsanto Chemicals Method of preparing shell molds and composition therefor
US2818397A (en) * 1954-02-15 1957-12-31 American Cyanamid Co Aqueous urea-formaldehyde starch adhesives and process of making
US2869195A (en) * 1956-09-26 1959-01-20 Dow Chemical Co Shell molding composition containing fatty alkylol amide condensate, inert filler and a phenolic resin and method of making mold
US3008205A (en) * 1958-09-19 1961-11-14 Gen Motors Corp Shell type molds and cores

Also Published As

Publication number Publication date
US3138836A (en) 1964-06-30

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