GB571390A - Process and composition for making moulds and article so produced - Google Patents
Process and composition for making moulds and article so producedInfo
- Publication number
- GB571390A GB571390A GB494/44A GB49444A GB571390A GB 571390 A GB571390 A GB 571390A GB 494/44 A GB494/44 A GB 494/44A GB 49444 A GB49444 A GB 49444A GB 571390 A GB571390 A GB 571390A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cellulose
- alkali
- soluble
- cellulosic material
- hydroxy
- 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
- B22C1/26—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 carbohydrates; of distillation residues therefrom
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Paints Or Removers (AREA)
Abstract
Moulds for use in casting metals, plastics or other materials are prepared by mixing pulverulent material such as foundry sand, loam, plaster of Paris, cement, or the like, with an aqueous dispersion of a hydrophilic coagulable cellulosic material as a binder and coagulating the binder; alternatively, moulds prepared in the usual way are treated on their faces with the cellulosic material. Coagulation may be effected by heating the mould and heating may be continued beyond evaporation of the liquid to effect graphitization of the cellulosic material. The cellulosic material is soluble in alkali and may be soluble or insoluble in water, and comprises alkyl cellulose ethers, e.g. methyl cellulose ether; hydroxy-alkyl cellulose ethers, e.g. hydroxy-ethyl cellulose ethers or ethyl-hydroxy-ethyl cellulose; carboxy-alkyl cellulose ethers, e.g. cellulose glycollic acid ether and its sodium and potassium salts; cellulose xanthate; cuprammonium cellulose; cellulose or regenerated cellulose rendered alkali-soluble by degradation and/or oxidation by heat, acids, alkalis, or the like to produce a material soluble in an alkaline solution of sodium zincate or stannate; or dispersions of cellulose in solvents such as zinc chloride, alkali perchlorates, alkali thiocyanates, concentrated sulphuric acid, or phosphoric acid. The material may be dispersed in sodium hydroxide, potassium hydroxide, quaternary ammonium hydroxide, tetrabenzyl ammonium hydroxide, or tribenzyl methyl ammonium hydroxide. The dispersions may comprise 2-8 per cent by weight of cellulosic material, 3-10 per cent alkali, and the remainder water. Fillers such as wood flour, clay, starch, and the like, and pigments may be added. The dispersion is mixed with the pulverulent material and the whole or part of the mould, including cores, is built therefrom, or the mould surfaces may be coated therewith by spraying, dipping, or brushing. After use, the material can be broken apart and re-used. According to examples, cellulosic materials are used to bind gypsum plaster, sand and wood flour.ALSO:Moulds for use in casting metals, plastics or other materials are prepared by mixing pulverulent material such as foundry sand, loam, plaster of Paris, cement, or the like, with an aqueous dispersion of a hydrophilic coagulable cellulosic material as a binder and coagulating the binder; alternatively, moulds prepared in the usual way are treated on their faces with the cellulosic material. Coagulation may be effected by heating the mould and heating may be continued beyond evaporation of the liquid to effect graphitization of the cellulosic material. The cellulosic material is soluble in alkalies and may be soluble or insoluble in water, and comprises alkyl cellulose ethers, e.g. methyl cellulose ether; hydroxy-alkyl cellulose ethers, e.g. hydroxy-ethyl cellulose ethers or ethyl-hydroxy-ethyl cellulose; carboxy-alkyl cellulose ethers, e.g. cellulose glycollic acid ether and its sodium and potassium salts; cellulose xanthate; cuprammonium cellulose; cellulose or regenerated cellulose rendered alkali-soluble by degradation and/or oxidation by heat, acids, alkalis, or the like to produce a material soluble in an alkaline solution of sodium zincate or stannate; or dispersions of cellulose in solvents such as zinc chloride, alkali perchlorates, alkali thiocyanates, concentrated sulphuric acid, or phosphoric acid. The material may be dispersed in sodium hydroxide, potassium hydroxide, quaternary ammonium hydroxide, tetrabenzyl ammonium hydroxide, or tribenzyl methyl ammonium hydroxide. The dispersions may comprise 2-8 per cent by weight of cellulosic material, 3-10 per cent alkali, and the remainder water. Fillers such as wood flour, clay, starch, and the like, and pigments may be added. The dispersion is mixed with the pulverulent material and the whole or part of the mould, including cores, is built therefrom, or the mould surfaces may be coated therewith by spraying, dipping, or brushing. After use, the material can be broken apart and re-used. According to examples, cellulosic materials are used to bind gypsum plaster, sand and wood flour.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US571390XA | 1942-12-17 | 1942-12-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB571390A true GB571390A (en) | 1945-08-22 |
Family
ID=22008742
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB494/44A Expired GB571390A (en) | 1942-12-17 | 1944-01-11 | Process and composition for making moulds and article so produced |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB571390A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102728782A (en) * | 2012-06-08 | 2012-10-17 | 繁昌县琦祥铸造厂 | Molding sand using clay as binder and producing method thereof |
CN102728781A (en) * | 2012-06-08 | 2012-10-17 | 繁昌县琦祥铸造厂 | Molding sand using cement as binder and producing method thereof |
CN113351824A (en) * | 2021-06-09 | 2021-09-07 | 山东交通学院 | Bionic casting binder and preparation method thereof |
-
1944
- 1944-01-11 GB GB494/44A patent/GB571390A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102728782A (en) * | 2012-06-08 | 2012-10-17 | 繁昌县琦祥铸造厂 | Molding sand using clay as binder and producing method thereof |
CN102728781A (en) * | 2012-06-08 | 2012-10-17 | 繁昌县琦祥铸造厂 | Molding sand using cement as binder and producing method thereof |
CN102728782B (en) * | 2012-06-08 | 2014-01-15 | 繁昌县琦祥铸造厂 | Molding sand using clay as binder and producing method thereof |
CN113351824A (en) * | 2021-06-09 | 2021-09-07 | 山东交通学院 | Bionic casting binder and preparation method thereof |
CN113351824B (en) * | 2021-06-09 | 2022-09-23 | 山东交通学院 | Bionic casting binder and preparation method thereof |
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