GB471346A - Improvements in articles of self bonded granular material and methods of making the same - Google Patents

Improvements in articles of self bonded granular material and methods of making the same

Info

Publication number
GB471346A
GB471346A GB26190/36A GB2619036A GB471346A GB 471346 A GB471346 A GB 471346A GB 26190/36 A GB26190/36 A GB 26190/36A GB 2619036 A GB2619036 A GB 2619036A GB 471346 A GB471346 A GB 471346A
Authority
GB
United Kingdom
Prior art keywords
mould
cooled
article
articles
melting point
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
GB26190/36A
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.)
Norton Grinding Wheel Co Ltd
Original Assignee
Norton Grinding Wheel Co Ltd
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 Norton Grinding Wheel Co Ltd filed Critical Norton Grinding Wheel Co Ltd
Publication of GB471346A publication Critical patent/GB471346A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B33/00—Clay-wares
    • C04B33/32—Burning methods
    • C04B33/326—Burning methods under pressure
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B33/00—Clay-wares
    • C04B33/32—Burning methods
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics

Abstract

471,346. Moulding refactory oxides. NORTON GRINDING WHEEL CO., Ltd. Sept. 26, 1936, No. 26190. Convention date, Sept. 30, 1935. [Classes 22 and 87 (ii)] Shaped articles of refractory oxides are made by placing pulverulent oxides in a mould, heating to a temperature below the melting point of the oxide while subjecting it to pressure and cooling. The oxide may be heated until it softens and then quickly cooled to a temperature below its melting point. The material may be an oxide of aluminium, magnesium, silicon, zirconium, titanium, beryllium, thorium, cerium or chromium or it may be mullite. The temperature may be just below 1800‹ C. or higher according to the melting point. The pressure may be from 50 to 10,000 lb. per sq. in. The temperature is adjusted so that there is little or no reaction between the mould, which may be of graphite, and the material. The article may be made in apparatus comprising a metal shell 10 having metal end walls 12 insulated therefrom by rings 14. The shell 10 may be cooled by water from a pipe 15. Heating is effected by an electrical resistance in the form of a graphite tube 20 supported in sleeves 21 and having water-cooled terminals 23 attached. The tube 20 is surrounded by pulverulent lamp black fed through a tube 16. The mould comprises a sleeve 31 carrying slidable end rings 33 and a core 32. Pressure is applied by plungers 35, 36, the plunger 35 bearing against an adjusting screw 37, while the plunger 36 is urged inwards by a weight 51 acting through a lever arm 53, which also carries a pointer 58 for indicating the movement. The moulded mass may be slowly cooled through an annealing zone and removed from the mould. The article may be cut into smaller pieces which may be shaped by abrasion. The article is formed with a substantially continuous phase of crystalline material having a conchoidal fracture. Tubes, nozzles, dies, bearings, spark plugs or other articles may be moulded. Specifications 439,529; and 449,315, [Group III], are referred to.
GB26190/36A 1935-09-30 1936-09-26 Improvements in articles of self bonded granular material and methods of making the same Expired GB471346A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US471346XA 1935-09-30 1935-09-30

Publications (1)

Publication Number Publication Date
GB471346A true GB471346A (en) 1937-09-02

Family

ID=21947243

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26190/36A Expired GB471346A (en) 1935-09-30 1936-09-26 Improvements in articles of self bonded granular material and methods of making the same

Country Status (1)

Country Link
GB (1) GB471346A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111893458A (en) * 2020-07-30 2020-11-06 山东国晶新材料有限公司 Demoulding method of narrow-neck crucible

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111893458A (en) * 2020-07-30 2020-11-06 山东国晶新材料有限公司 Demoulding method of narrow-neck crucible

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