GB789721A - Improvements relating to casting processes for metals - Google Patents
Improvements relating to casting processes for metalsInfo
- Publication number
- GB789721A GB789721A GB6913/54A GB691354A GB789721A GB 789721 A GB789721 A GB 789721A GB 6913/54 A GB6913/54 A GB 6913/54A GB 691354 A GB691354 A GB 691354A GB 789721 A GB789721 A GB 789721A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mould
- core
- refractory
- passages
- wax
- 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
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/02—Lost patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
789,721. Making moulds for casting metals. ROLLS-ROYCE, Ltd. March 24, 1955 [March 9, 1954], No. 6913/54. Class 87(2). [Also in Group XXII] An expendable pattern comprising an insert or core 11, Fig. 4 (Provisional) or refractory material and a coating 16 of wax, polystyrene or frozen mercury (which pattern is to be invested in refractory material R, Fig. 5, the wax &c. part of the pattern being then removed from R to provide a mould for casting a hollow article, e.g., a hollow turbine blade) is made by a threestage process. First, Fig. 1, the refractory core is made by casting, e.g., a gellable sillimanite composition in a two-part mould A, B, the core being strengthened by,rods 10 of silica, alumina, mullite or porcelain : the rods may be hollow. The sillimanite composition (see below) may contain alcohol, in which case the core may be removed from the mould and the alcohol burnt off before the next stage. Second, Fig. 2, the mould part A is replaced by a mould part C which leaves a space 12 into which wax &c. is injected to coat one face of the core. Third, Fig. 3, the mould B is replaced by a mould part D to leave a space 14 into which wax &c. is injected to coat the other face of the core. The resultant pattern is mounted on a base plate 17, Fig. 5, of an investment container 19 by means of a wax support 18 which forms a sprue passage for the entry of metal into the refractory mould when it is melted out, the refractory material R is cast in the container 19 to form the mould, and the wax coating 16 and wax support 17 are melted out, the refractory core 11 being left embedded in the refractory mould to form the hollow turbine blade &c. When the blade has been cast the core 11 is removed therefrom as by sand-blasting. The material R may be refractory material bound with sodium silicate or hydrolysed ethyl silicate, or concrete. Modifications and details. (1) The completed turbine blade may have not one through passage, as represented by 11, Fig. 5, but three through passages (for the flow of cooling air) ; or as shown in Fig. 7, three passages 21 may terminate short of one end of the blade, being interconnected by short passages 21A. When the passages are through passages the cores may be simple refractory rods. When the passages are as shown in Fig., 7, a trident-shaped core may be used. The cores may be cast in a mould as in Fig. 1, or the rods may be preformed and supported in a mould as in Fig. 4 (Complete), the rods being shown at 10a. (2) The mould of Figs. 2 and 3 may have three or more parts. (3) Prior to investment in the mould material R, the pattern may be coated with finely-divided refractory suspended in a liquid binder and then with dry refractory powder. (4) The gellable sillimanite composition for making the core 11 may comprise 140 gr. of sillimanite of specified grain sizes, 55 c.c. of hydrolysed ethyl silicate solution (containing alcohol and hydrochloric acid) and 2À5 c.c. of ammonia solution. According to the Provisional Specification the two lots of wax &c. which coat the refractory core are injected through passages 13A, 15A, Fig. 6, formed entirely in the mould halves C<SP>1</SP>, D<SP>1</SP> ; this Fig. 6 shows cores arranged to produce passages as in Fig. 7. Specification 789,722 is referred to.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB36593/54A GB789722A (en) | 1954-03-09 | 1954-03-09 | Improvements relating to casting processes for metals |
GB6913/54A GB789721A (en) | 1954-03-09 | 1954-03-09 | Improvements relating to casting processes for metals |
US490370A US2752653A (en) | 1954-03-09 | 1955-02-24 | Method of and dies for forming hollow expendable patterns for casting |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB6913/54A GB789721A (en) | 1954-03-09 | 1954-03-09 | Improvements relating to casting processes for metals |
Publications (1)
Publication Number | Publication Date |
---|---|
GB789721A true GB789721A (en) | 1958-01-29 |
Family
ID=9823121
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB36593/54A Expired GB789722A (en) | 1954-03-09 | 1954-03-09 | Improvements relating to casting processes for metals |
GB6913/54A Expired GB789721A (en) | 1954-03-09 | 1954-03-09 | Improvements relating to casting processes for metals |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB36593/54A Expired GB789722A (en) | 1954-03-09 | 1954-03-09 | Improvements relating to casting processes for metals |
Country Status (2)
Country | Link |
---|---|
US (1) | US2752653A (en) |
GB (2) | GB789722A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1292788B (en) * | 1961-01-27 | 1969-04-17 | Howe Sound Co | Process for the production of lost models for the precision casting process |
DE1508663B1 (en) * | 1966-02-02 | 1970-06-25 | Howe Sound Company, New York, N y (V.St.A.) | Method and device for the production of lost models for the precision casting process |
US4462453A (en) * | 1979-06-04 | 1984-07-31 | Deere & Company | Casting methods with composite molded core assembly |
FR2594727A1 (en) * | 1986-02-27 | 1987-08-28 | Snecma | PROCESS FOR PREPARING CERAMIC NUCLES |
CN112935228A (en) * | 2021-01-28 | 2021-06-11 | 季华实验室 | Aviation blade wax matrix mould mold opening device |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE536963A (en) * | 1954-04-01 | |||
US2994931A (en) * | 1958-09-12 | 1961-08-08 | Misco P C Inc | Mold element and method for manufacture of same |
GB1055737A (en) * | 1964-03-25 | 1967-01-18 | Wellworthy Ltd | Improvements in casting processes |
NL130660C (en) * | 1965-04-26 | |||
US3368244A (en) * | 1966-04-04 | 1968-02-13 | Mueller Hans | Wax injection press |
DE2301105C2 (en) * | 1973-01-10 | 1984-07-05 | Sherwood Refractories Inc., Cleveland, Ohio | Precision mold and method of making it |
US4015654A (en) * | 1975-02-03 | 1977-04-05 | United Aircraft Of Canada Limited | Adjustable tooling method and apparatus for investment patterns |
US4736786A (en) * | 1985-12-31 | 1988-04-12 | Deere & Company | Method for improving stength of gasifiable patterns |
US4905750A (en) * | 1988-08-30 | 1990-03-06 | Amcast Industrial Corporation | Reinforced ceramic passageway forming member |
US9364889B2 (en) * | 2012-01-05 | 2016-06-14 | Ic Patterns, Llc | Foam pattern techniques |
CN111230049B (en) * | 2020-02-28 | 2021-10-12 | 江苏徐工工程机械研究院有限公司 | 3D printing-based integral hydraulic multi-way valve sand core casting process |
CN114101598B (en) * | 2021-11-29 | 2024-06-18 | 江门市艾米卫浴科技有限公司 | Hardware bathroom piece forming die and use method thereof |
-
1954
- 1954-03-09 GB GB36593/54A patent/GB789722A/en not_active Expired
- 1954-03-09 GB GB6913/54A patent/GB789721A/en not_active Expired
-
1955
- 1955-02-24 US US490370A patent/US2752653A/en not_active Expired - Lifetime
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1292788B (en) * | 1961-01-27 | 1969-04-17 | Howe Sound Co | Process for the production of lost models for the precision casting process |
DE1508663B1 (en) * | 1966-02-02 | 1970-06-25 | Howe Sound Company, New York, N y (V.St.A.) | Method and device for the production of lost models for the precision casting process |
US4462453A (en) * | 1979-06-04 | 1984-07-31 | Deere & Company | Casting methods with composite molded core assembly |
FR2594727A1 (en) * | 1986-02-27 | 1987-08-28 | Snecma | PROCESS FOR PREPARING CERAMIC NUCLES |
EP0237400A1 (en) * | 1986-02-27 | 1987-09-16 | Societe Nationale D'etude Et De Construction De Moteurs D'aviation, "S.N.E.C.M.A." | Process for the preparation of ceramic cores |
CN112935228A (en) * | 2021-01-28 | 2021-06-11 | 季华实验室 | Aviation blade wax matrix mould mold opening device |
CN112935228B (en) * | 2021-01-28 | 2022-05-10 | 季华实验室 | Aviation blade wax matrix mould mold opening device |
Also Published As
Publication number | Publication date |
---|---|
GB789722A (en) | 1958-01-29 |
US2752653A (en) | 1956-07-03 |
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