US1610941A - Wash for sand cores and molds for metal founding - Google Patents
Wash for sand cores and molds for metal founding Download PDFInfo
- Publication number
- US1610941A US1610941A US69513A US6951325A US1610941A US 1610941 A US1610941 A US 1610941A US 69513 A US69513 A US 69513A US 6951325 A US6951325 A US 6951325A US 1610941 A US1610941 A US 1610941A
- Authority
- US
- United States
- Prior art keywords
- wash
- molds
- sand cores
- metal founding
- oil
- 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
- 239000002184 metal Substances 0.000 title description 4
- 229910052751 metal Inorganic materials 0.000 title description 4
- 239000003921 oil Substances 0.000 description 8
- 235000019198 oils Nutrition 0.000 description 8
- 229910001570 bauxite Inorganic materials 0.000 description 7
- 239000011230 binding agent Substances 0.000 description 7
- 238000005266 casting Methods 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 235000013379 molasses Nutrition 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229920001353 Dextrin Polymers 0.000 description 1
- 244000068988 Glycine max Species 0.000 description 1
- 235000010469 Glycine max Nutrition 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- FYGDTMLNYKFZSV-MRCIVHHJSA-N dextrin Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)OC1O[C@@H]1[C@@H](CO)OC(O[C@@H]2[C@H](O[C@H](O)[C@H](O)[C@H]2O)CO)[C@H](O)[C@H]1O FYGDTMLNYKFZSV-MRCIVHHJSA-N 0.000 description 1
- 235000021388 linseed oil Nutrition 0.000 description 1
- 239000000944 linseed oil Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
Definitions
- My improved wash is particularly adapted for steel castings but it may be used with advantage in making castingrs of other metals.
- the present practice is to use a wash made by mixing silica (SiO) with molasses.
- SiO silica
- the material of the wash sticks to the metal when the same is poured. and it is difficult to clean the castings when removed from the mold.
- "It is also difficult to finish a casting when such a wash has been 4 used because of the formation of the ironsilicates on the surface ofthe casting. the finishing tools becomingquickly dulled on account of the hardness. This adds to the time and the labor required for turning out a finished castinL.
- the object which I have in View is the provision of a wash which will cause the casting to be readily cleansable and which will impart to the casting a soft aluminumalloy surface which is easily cut in the tinishing operation.
- the organic oil is preferably a vegetable oil. and I have found satisfactory linseed oil or soya bean oil.
- the proportions which I find to be advantageous are approximately one hundred pounds of bauxite not more than three pounds of oil. and not more than three pounds of binder.
- the wash composition may be packed and shipped in this form.
- the fusingpoint of bauxite or aluminaoxide is approximately 3200 degrees Fahn, while that of steel in proper molten form for pouring is approximately 2700 degrees Fahr.
- the bauxite does notfuse in the presence of the molten steel and therefore there is no burning in of the materials of the wash in the steel of the castinc. 7
- a thin layer of bauxite which being relatively soft is easily and quickly rem ved by a sand blast or by the finishing tool.
- a wash compound for foundry cores and molds comprised of alumina-oxide, a binder and organic oil.
- a wash compound for foundry cores and molds comprised of aluminaoxide, a binder and organic oil in substantially the proportions of three pounds'each of the binder and the oil to one hundred pounds of alumina-oxide.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Description
Patented Dec ltd, 1020 WASH FOR SAND CORES AND IVIOLDS FOR METAL FOUNDING.
No Drawing.
My improved wash is particularly adapted for steel castings but it may be used with advantage in making castingrs of other metals. The present practice is to use a wash made by mixing silica (SiO) with molasses. In the use of a wash of this character frequently the material of the wash sticks to the metal when the same is poured. and it is difficult to clean the castings when removed from the mold. "It is also difficult to finish a casting when such a wash has been 4 used because of the formation of the ironsilicates on the surface ofthe casting. the finishing tools becomingquickly dulled on account of the hardness. This adds to the time and the labor required for turning out a finished castinL.
The object which I have in View is the provision of a wash which will cause the casting to be readily cleansable and which will impart to the casting a soft aluminumalloy surface which is easily cut in the tinishing operation.
For this purpose I have invented a new and improved wash characterized by the presence of bauxite or alumina'oxide More particularly my wash is formed of a composition of bauxite and organic oil and a binder.
The organic oil is preferably a vegetable oil. and I have found satisfactory linseed oil or soya bean oil.
For a binder I have successfully used sulphite pitch. molasses or dextrine.
The proportions which I find to be advantageous are approximately one hundred pounds of bauxite not more than three pounds of oil. and not more than three pounds of binder.
In preparing the wash I prefer to first -mix the binder and oil together and then add the bauxite in small quantities together with suflicient water so that as it is stirred Application filed November 16,1925. Serial No. 69,513.
a composition of putty like consistency is obtained. The wash composition may be packed and shipped in this form.
When the wash is to be gotten ready for use itis mixed with sufficient water to obtain a composition of paint like consistency which can be readily brushed or sprayed on the cores or molds.
If desired, of course, in making the origi nal mixture sufficient Water may be employed to obtain a paint like consistency instead of a putty like consistency. but where the wash-compound is prepared at a factorv for shipment to the foundry, it is preferable to produce the putty like form, as it can be more advantageously barreled or otherwise packed for delivery.
The fusingpoint of bauxite or aluminaoxide is approximately 3200 degrees Fahn, while that of steel in proper molten form for pouring is approximately 2700 degrees Fahr. As a result the bauxite does notfuse in the presence of the molten steel and therefore there is no burning in of the materials of the wash in the steel of the castinc. 7 When the casting is removed from the mold there is found deposited on the surface thereof a thin layer of bauxite which being relatively soft is easily and quickly rem ved by a sand blast or by the finishing tool.
What I desire to claim is 2- l. A wash compound for foundry cores and molds comprised of alumina-oxide, a binder and organic oil.
2. A wash compound for foundry cores and molds comprised of aluminaoxide, a binder and organic oil in substantially the proportions of three pounds'each of the binder and the oil to one hundred pounds of alumina-oxide.
Signed at Pittsburgh, Pa, this 13th day of November. 1925.
' EDWARD D. FROHMAN.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US69513A US1610941A (en) | 1925-11-16 | 1925-11-16 | Wash for sand cores and molds for metal founding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US69513A US1610941A (en) | 1925-11-16 | 1925-11-16 | Wash for sand cores and molds for metal founding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1610941A true US1610941A (en) | 1926-12-14 |
Family
ID=22089489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US69513A Expired - Lifetime US1610941A (en) | 1925-11-16 | 1925-11-16 | Wash for sand cores and molds for metal founding |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1610941A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2491096A (en) * | 1945-08-31 | 1949-12-13 | Austenal Lab Inc | Casting mold |
-
1925
- 1925-11-16 US US69513A patent/US1610941A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2491096A (en) * | 1945-08-31 | 1949-12-13 | Austenal Lab Inc | Casting mold |
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