US2583533A - Method of destroying patterns - Google Patents
Method of destroying patterns Download PDFInfo
- Publication number
- US2583533A US2583533A US778042A US77804247A US2583533A US 2583533 A US2583533 A US 2583533A US 778042 A US778042 A US 778042A US 77804247 A US77804247 A US 77804247A US 2583533 A US2583533 A US 2583533A
- Authority
- US
- United States
- Prior art keywords
- oxygen
- casting
- model
- compound
- burning
- 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 - Lifetime
Links
- 238000000034 method Methods 0.000 title claims description 10
- 238000005266 casting Methods 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 150000002739 metals Chemical class 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 2
- 238000007254 oxidation reaction Methods 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 239000011230 binding agent Substances 0.000 description 4
- 239000003610 charcoal Substances 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 239000002023 wood Substances 0.000 description 4
- 229910002651 NO3 Inorganic materials 0.000 description 3
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920001800 Shellac Polymers 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 150000003839 salts Chemical group 0.000 description 1
- ZLGIYFNHBLSMPS-ATJNOEHPSA-N shellac Chemical compound OCCCCCC(O)C(O)CCCCCCCC(O)=O.C1C23[C@H](C(O)=O)CCC2[C@](C)(CO)[C@@H]1C(C(O)=O)=C[C@@H]3O ZLGIYFNHBLSMPS-ATJNOEHPSA-N 0.000 description 1
- 239000004208 shellac Substances 0.000 description 1
- 229940113147 shellac Drugs 0.000 description 1
- 235000013874 shellac Nutrition 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
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
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/02—Lost patterns
- B22C7/023—Patterns made from expanded plastic materials
-
- 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
-
- 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
- B22C9/046—Use of patterns which are eliminated by the liquid metal in the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
- B29C33/448—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles destructible
Definitions
- This invention relates to a method of casting various castable materials. It is adapted to be used particularly in casting metals and metal alloys but the invention may also be used in casting other castable materials which set upon casting.
- While casting the material to be cast is poured into a sand mold, said sand mold being obtained by means of a model.
- the model requires thorough and accurate operation.
- the models are generally made of wood and are built up from several parts which are required to fit one another so that after the sand mold is made they are adapted to be removed therefrom. It is obvious that very much care must be bestowed upon the manufacture of such models and this renders the models very expensive. If a casting model is required to be quickly available the method hitherto adopted is inconvenient. If the model serves for the manufacture of only one or some few castings the cost of the model is comparatively high.
- the invention has for its object to obviate these difllculties.
- a casting mold or a casting model is modelled entirely or in part from combustible material which is adapted to burn entirely or substantially entirely without access of air oxygen and without leaving any substantial ash-residue.
- Such a casting model is used to make mold in the usual manner by means of sand or the like.
- the combustible model is provided with a projecting part adapted to be approached and ignited from the outside. In practice a projecting part of about cm. sufiices to enable casting.
- a model according to the invention is adapted to be readily formed, for example by modelling, and there is no objection to its having the most capricious and irregular forms.
- a great advantage is that the model may be in one piece. In such cases a casting model is obtained which is made entirely from the combustible material referred to. It is however also possible for the casting model to be made from the combustible material only in part and this has particular advantages in the case of large casting models. They may be built up from thin wood or other combustible material which is coated with the combustible material required to be used in accordance with the invention. The wood may be soaked with combustible material.
- the combustible material to be used may be constituted by charcoal with a nitrate, for example ammonium nitrate.
- a nitrate for example ammonium nitrate.
- the latter gives 011 the required oxygen which is necessary for causing the charcoal to be burnt.
- a binder may be constituted by resin or synthetic resin, or an organic product comparable therewith, for example shellac.
- the model contains only organic products and inorganic substances that leave no salt residues.
- ammonium nitrate is highly suited.
- Combustible substances and mixtures of the kind required to be used in accordance with the invention are known in the pyro-technical industry. Slowly burning mixtures of this kind are used, for example, for fuses. In addition, timing in shells is effected by a slowly burning priming circle.
- the combustion gases may escape through the channel or the cavities which are produced by the combustion of the model from the outside.
- the low deposition of soot that may take place in the interior of the casting mold is not ⁇ inconvenient and: has even advantages while casting.
- a suitable choice of the components of the model permits of controlling the speed of combustion.
- a casting mould made with a pattern of a substance essentially comprising a material which combines with oxygen in an exothermic reaction and whose oxidation products are primarily gaseous, an oxygen-combustible binder and a normally stable, solid, oxygen-rich. compound which is unstable at temperatures below the temperature of said exothermic reaction, said compound being present in an amount sufficient fully to combust said material and said binder. and burning said substance within said mold, the oxygen for burning being supplied by said compound, whereby to leave a mold cavity.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL2583533X | 1945-04-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2583533A true US2583533A (en) | 1952-01-29 |
Family
ID=19874864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US778042A Expired - Lifetime US2583533A (en) | 1945-04-17 | 1947-10-04 | Method of destroying patterns |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2583533A (en)) |
| BE (1) | BE475874A (en)) |
| NL (1) | NL62872C (en)) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2830343A (en) * | 1956-04-26 | 1958-04-15 | Harold F Shroyer | Cavityless casting mold and method of making same |
| US2871528A (en) * | 1954-09-01 | 1959-02-03 | Kolcast Ind Inc | Method of and apparatus for forming frangible casting molds |
| US2944338A (en) * | 1953-12-30 | 1960-07-12 | Gen Electric | Spray metal process for making precision articles |
| US3144323A (en) * | 1959-05-01 | 1964-08-11 | Foseco Int | Treatment of molten light alloys |
| US3314116A (en) * | 1962-04-02 | 1967-04-18 | Full Mold Process Inc | Gasifiable casting pattern |
| US4240492A (en) * | 1978-10-23 | 1980-12-23 | Nibco, Inc. | Process of forming multi piece vaporizable pattern for foundry castings |
| US4743462A (en) * | 1986-07-14 | 1988-05-10 | United Technologies Corporation | Method for preventing closure of cooling holes in hollow, air cooled turbine engine components during application of a plasma spray coating |
| US9206499B2 (en) | 2010-08-30 | 2015-12-08 | United Technologies Corporation | Minimizing blockage of holes in turbine engine components |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1583459A (en) * | 1925-04-28 | 1926-05-04 | Thomas C Hansen | Pin form for crowns and the like |
| US1856419A (en) * | 1927-06-18 | 1932-05-03 | Anna Catherine Frisbey | Safety combination fuse tip |
| US2351919A (en) * | 1942-07-16 | 1944-06-20 | Plastie Veneering Inc | Method of coating wooden patterns |
| US2362507A (en) * | 1942-10-27 | 1944-11-14 | Steinbock | Method and means for producing commercial castings |
| US2393594A (en) * | 1941-07-08 | 1946-01-29 | Du Pont | Operation of internal-combustion engines |
-
0
- BE BE475874D patent/BE475874A/xx unknown
- NL NL62872D patent/NL62872C/xx active
-
1947
- 1947-10-04 US US778042A patent/US2583533A/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1583459A (en) * | 1925-04-28 | 1926-05-04 | Thomas C Hansen | Pin form for crowns and the like |
| US1856419A (en) * | 1927-06-18 | 1932-05-03 | Anna Catherine Frisbey | Safety combination fuse tip |
| US2393594A (en) * | 1941-07-08 | 1946-01-29 | Du Pont | Operation of internal-combustion engines |
| US2351919A (en) * | 1942-07-16 | 1944-06-20 | Plastie Veneering Inc | Method of coating wooden patterns |
| US2362507A (en) * | 1942-10-27 | 1944-11-14 | Steinbock | Method and means for producing commercial castings |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2944338A (en) * | 1953-12-30 | 1960-07-12 | Gen Electric | Spray metal process for making precision articles |
| US2871528A (en) * | 1954-09-01 | 1959-02-03 | Kolcast Ind Inc | Method of and apparatus for forming frangible casting molds |
| US2830343A (en) * | 1956-04-26 | 1958-04-15 | Harold F Shroyer | Cavityless casting mold and method of making same |
| US3144323A (en) * | 1959-05-01 | 1964-08-11 | Foseco Int | Treatment of molten light alloys |
| US3314116A (en) * | 1962-04-02 | 1967-04-18 | Full Mold Process Inc | Gasifiable casting pattern |
| US4240492A (en) * | 1978-10-23 | 1980-12-23 | Nibco, Inc. | Process of forming multi piece vaporizable pattern for foundry castings |
| US4743462A (en) * | 1986-07-14 | 1988-05-10 | United Technologies Corporation | Method for preventing closure of cooling holes in hollow, air cooled turbine engine components during application of a plasma spray coating |
| US9206499B2 (en) | 2010-08-30 | 2015-12-08 | United Technologies Corporation | Minimizing blockage of holes in turbine engine components |
Also Published As
| Publication number | Publication date |
|---|---|
| BE475874A (en)) | |
| NL62872C (en)) |
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