GB927978A - Manufacture of foundry moulds and cores - Google Patents
Manufacture of foundry moulds and coresInfo
- 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
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.
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)
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)
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 |
-
1960
- 1960-12-27 US US78653A patent/US3138836A/en not_active Expired - Lifetime
-
1961
- 1961-12-06 GB GB43683/61A patent/GB927978A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US3138836A (en) | 1964-06-30 |
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