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GB543202A - Improvements in and relating to the production of sand cores for foundry purposes - Google Patents

Improvements in and relating to the production of sand cores for foundry purposes

Info

Publication number
GB543202A
GB543202A GB1352440A GB1352440A GB543202A GB 543202 A GB543202 A GB 543202A GB 1352440 A GB1352440 A GB 1352440A GB 1352440 A GB1352440 A GB 1352440A GB 543202 A GB543202 A GB 543202A
Authority
GB
United Kingdom
Prior art keywords
oil
starch
added
borax
per cent
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
GB1352440A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB1352440A priority Critical patent/GB543202A/en
Publication of GB543202A publication Critical patent/GB543202A/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
    • B22C1/24—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 oily or fatty substances; of distillation residues therefrom
    • 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
    • B22C1/2293—Natural polymers

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Mold Materials And Core Materials (AREA)

Abstract

543,202. Core materials. NICOLSON, J. Aug. 27, 1940, No. 13524. [Class 83 (i)] Core material, stated to retain its plasticity for rammed or blown cores over long periods, comprises sand, oil, borax, and the product obtained from starch containing protein by thinning and partly cooking or gelatinising. A water suspension of 30-35 per cent maize, 2-15 per cent protein content may be heated to 50‹ C., hydrochloric acid added until 10 ccs. of the filtered liquid will neutralize 14-16 ccs. of deci-normal sodium hydrate solution. Heating is continued for 15-20 hours while agitating. Tests are made meanwhile, by the Scott method of estimating fluidity, on 65 grams of the starch, neutralized and dried, mixed with 280 c.c.s. of water. When a fluidity of between 40-50 is reached heating is stopped and the starch neutralized to pH 6-6.8 with soda ash. Ten to 15 per cent of borax, calculated on dry starch, is then added to the starch suspension which is partly cooked, dried on film-drying cylinders, ground to pass a 30 mesh sieve, and mixed with core oil, a suitable oil being 50 parts linseed, 30 rosin oil, and 20 bitumen. Alternatively the borax is added with the oil after drying. In a modification the dextrine process may be used for thinning. If bitumen is omitted, anti-oxidants, such as phenol-betanaphthol, hydroquinone, or pyrogallol, or antiseptics, such as formaldehyde or cresol, or both, may be added to prevent hardening and rancidity. Specification 515,470 is referred to.
GB1352440A 1940-08-27 1940-08-27 Improvements in and relating to the production of sand cores for foundry purposes Expired GB543202A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1352440A GB543202A (en) 1940-08-27 1940-08-27 Improvements in and relating to the production of sand cores for foundry purposes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1352440A GB543202A (en) 1940-08-27 1940-08-27 Improvements in and relating to the production of sand cores for foundry purposes

Publications (1)

Publication Number Publication Date
GB543202A true GB543202A (en) 1942-02-13

Family

ID=10024536

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1352440A Expired GB543202A (en) 1940-08-27 1940-08-27 Improvements in and relating to the production of sand cores for foundry purposes

Country Status (1)

Country Link
GB (1) GB543202A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2974050A (en) * 1958-06-27 1961-03-07 Int Minerals & Chem Corp Core binder
US2974048A (en) * 1957-12-30 1961-03-07 Int Minerals & Chem Corp Core binder
US2974049A (en) * 1957-12-30 1961-03-07 Int Minerals & Chem Corp Foundry core binder
US2977236A (en) * 1957-12-30 1961-03-28 Int Minerals & Chem Corp Core binder
CN101274351B (en) * 2007-03-29 2010-04-14 沈阳工业大学 A kind of foundry binder and preparation method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2974048A (en) * 1957-12-30 1961-03-07 Int Minerals & Chem Corp Core binder
US2974049A (en) * 1957-12-30 1961-03-07 Int Minerals & Chem Corp Foundry core binder
US2977236A (en) * 1957-12-30 1961-03-28 Int Minerals & Chem Corp Core binder
US2974050A (en) * 1958-06-27 1961-03-07 Int Minerals & Chem Corp Core binder
CN101274351B (en) * 2007-03-29 2010-04-14 沈阳工业大学 A kind of foundry binder and preparation method thereof

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