GB770527A - Refractory moulds for investment casting - Google Patents
Refractory moulds for investment castingInfo
- Publication number
- GB770527A GB770527A GB313654A GB313654A GB770527A GB 770527 A GB770527 A GB 770527A GB 313654 A GB313654 A GB 313654A GB 313654 A GB313654 A GB 313654A GB 770527 A GB770527 A GB 770527A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- silicate
- solution
- refractory
- ethyl
- 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
- B22C1/165—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 in the manufacture of multilayered shell moulds
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
A lost wax moulding process comprises coating a wax or other expendable pattern with a finely divided refractory filler suspended in a liquid binder, dusting a relatively coarse refractory onto the coated pattern, then carrying out at least once the sequence of covering the coated pattern with acid hydrolysed methyl or ethyl silicate solution, the solution being prepared by using only HC1 for the acid to promote hydrolysis and not having any refractory material suspended in it, followed by dusting the coated pattern with a relatively coarse refractory. The coating is then allowed to dry and the mould body formed by investment with a powdered refractory which may be suspended in a suitable bonding liquid. The initial coating may be 200 mesh silica flint or zirconium silicate in a binder prepared from sodium silicate or potassium silicate, with or without hydrochloric acid, together with a wetting agent such as a soap solution and if desired a film forming agent such as ammonium or sodium alginate or alginic acid. Other compositions may be bound with ethyl silicate. One specific example quoted comprises 200 mesh alumina cement, a solution of dioctyl or dinonyl sodium sulphosuccinate, water and 2 ethyl hexanol. The relatively coarse refractory may be fireclay grog, calcined kaolin, or zirconium silicate. The acid hydrolysed solution is preferably ethyl silicate, and specific examples of solutions and methods of preparation are quoted. The body of the mould may be of fireclay p grog, sillimanite, mullite, calcined kaolin, zirconium silicate, zirconia, silica, or alumina, and binders therefore may be hydrolysed ethyl silicate solutions, or the acid reaction products obtained from the reaction of sodium silicate solution with a dilute mineral acid such as nitric acid. Alternatively, the body of the mould may be a mixture of alumina and Portland cement bound with water. Specifications 290,717 [Class 22], 650,532, 674,137 and 678,035 are referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB313654A GB770527A (en) | 1954-02-02 | 1954-02-02 | Refractory moulds for investment casting |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB313654A GB770527A (en) | 1954-02-02 | 1954-02-02 | Refractory moulds for investment casting |
Publications (1)
Publication Number | Publication Date |
---|---|
GB770527A true GB770527A (en) | 1957-03-20 |
Family
ID=9752606
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB313654A Expired GB770527A (en) | 1954-02-02 | 1954-02-02 | Refractory moulds for investment casting |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB770527A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2948935A (en) * | 1958-04-07 | 1960-08-16 | Richard T Carter | Process of making refractory shell for casting metal |
US4060120A (en) * | 1975-12-31 | 1977-11-29 | Matsumoto Dental College | Investment casting process of chromium-cobalt and/or nickel alloys |
-
1954
- 1954-02-02 GB GB313654A patent/GB770527A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2948935A (en) * | 1958-04-07 | 1960-08-16 | Richard T Carter | Process of making refractory shell for casting metal |
US4060120A (en) * | 1975-12-31 | 1977-11-29 | Matsumoto Dental College | Investment casting process of chromium-cobalt and/or nickel alloys |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB601260A (en) | Improvements in and relating to moulds for casting metals | |
GB1410634A (en) | Mould preparation | |
GB770527A (en) | Refractory moulds for investment casting | |
US3148422A (en) | Production of shell moulds | |
US3979215A (en) | Refractory articles and methods of producing same | |
US2881081A (en) | Refractory binder for metal casting molds | |
JPS57206548A (en) | Fibrous composition for mold | |
GB1199013A (en) | Refractory Ramming Mix Composition and process of Forming Refractory Surface | |
GB722816A (en) | Improvements relating to precision casting by the lost-wax process | |
GB672535A (en) | Improvements in or relating to refractory moulds | |
GB1434370A (en) | Ceramic sheel mould | |
GB1467904A (en) | Process for producing a refractory article | |
GB1119223A (en) | Process for the production of precision casting moulds | |
GB692030A (en) | Improvements relating to moulding mixtures | |
GB768232A (en) | Precision moulds for casting metals using polysilicate binders | |
GB1034368A (en) | Improvements in and relating to the lost-wax casting process | |
GB669130A (en) | Improvements in precision casting | |
GB731445A (en) | Moulds for precision casting | |
GB871428A (en) | Improvements in or relating to refractory materials | |
GB1031587A (en) | Ceramic shell mould | |
GB1027419A (en) | Improvements in or relating to the production of refractory moulds | |
GB1251656A (en) | ||
GB711199A (en) | Improved method of preparing moulds for precision casting by the "cire-perdue" process | |
SU399286A1 (en) | SUSPENSION FOR MAKING CERAMIC FORMS | |
GB1064991A (en) | Metal casting process |