US41203A - Improvement in molds for casting steel - Google Patents
Improvement in molds for casting steel Download PDFInfo
- Publication number
- US41203A US41203A US41203DA US41203A US 41203 A US41203 A US 41203A US 41203D A US41203D A US 41203DA US 41203 A US41203 A US 41203A
- Authority
- US
- United States
- Prior art keywords
- molds
- mold
- improvement
- casting steel
- steel
- 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
- 229910000831 Steel Inorganic materials 0.000 title description 14
- 239000010959 steel Substances 0.000 title description 14
- 238000005266 casting Methods 0.000 title description 8
- 239000004576 sand Substances 0.000 description 14
- 241000209456 Plumbago Species 0.000 description 8
- 239000010439 graphite Substances 0.000 description 8
- 239000004927 clay Substances 0.000 description 6
- 229910052570 clay Inorganic materials 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000007789 gas Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 241000022563 Rema Species 0.000 description 2
- 230000001070 adhesive Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
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
- castings are formed with air spaces or cells, or blown, as it is technically termed.
- Dry-sand molds cannot be used, as the melted metal fuses and cuts away the inner surface of the mold, so that it will not produce a perfect casting.
- Cast-iron molds have also been tried but these also are fused or cut away by the melted steel, and also'produce blown castings, as there is no ready escape for the air and gases during the advent of the melted steel into the mold. Imperfect steel castings therefore are now quite commonly used.
- my invention 1 can produce perfect steel castings for the purpose specified with the greatest facility and without any greater expense, or not appreciably greater than that attending ordinary iron castings in sand molds.
- sand 1 form a mold by means of a' suitable pattern out of dry sand in the usual way, and after the mold vis formed I coat its inner surface with black-lead, (plumbago,) which may be moistened by water having a little fire-clay dissolved in it.
- the sand also'used in forming the mold may be tempered with fireclay water. This fire-clay waterhas atendency to render the sand and black-lead or plumba go rather more adhesive than they would be if water alone were used.
- the mold After the mold is formed and coated internally with the black-lead or plumbago, it is baked, say, for about twelve hours, or until all moisture is thoroughly expelled from it, and when thus baked and thoroughly dried the black-lead or plumbago will form a hard crust, coat, or glazing for the inner surface of the mold, so as to prevent the melted steel from coming in contact with the sand.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Description
UNITED STATES- PATENT OFFICE.
JOHN DEERE, OF MOLINE, ILLINOIS.
IMPROVEMENT lN MOLDS FOR CASTING STEEL.
Specification forming part of Letters Patent No. 1,203, dated January 12, 1864.
as the castings are formed with air spaces or cells, or blown, as it is technically termed.
Dry-sand molds cannot be used, as the melted metal fuses and cuts away the inner surface of the mold, so that it will not produce a perfect casting. Cast-iron molds have also been tried but these also are fused or cut away by the melted steel, and also'produce blown castings, as there is no ready escape for the air and gases during the advent of the melted steel into the mold. Imperfect steel castings therefore are now quite commonly used.
By my invention 1 can produce perfect steel castings for the purpose specified with the greatest facility and without any greater expense, or not appreciably greater than that attending ordinary iron castings in sand molds.
To enable those skilled in' the art to fully understand and practice my invention, I will proceed to describe it.
1 form a mold by means of a' suitable pattern out of dry sand in the usual way, and after the mold vis formed I coat its inner surface with black-lead, (plumbago,) which may be moistened by water having a little fire-clay dissolved in it. The sand also'used in forming the mold may be tempered with fireclay water. This fire-clay waterhas atendency to render the sand and black-lead or plumba go rather more adhesive than they would be if water alone were used. After the mold is formed and coated internally with the black-lead or plumbago, it is baked, say, for about twelve hours, or until all moisture is thoroughly expelled from it, and when thus baked and thoroughly dried the black-lead or plumbago will form a hard crust, coat, or glazing for the inner surface of the mold, so as to prevent the melted steel from coming in contact with the sand.
The latter therefore cannot be fused and cut may, before being baked and dried, be peril,
rated with vent-holes to admit of the escape of air and gases. I would further rema'rkthat the mold is used but for one casting only, it
being, after once used, broken up or pulverized and the same ingredients used for the formation of another mold.
Having thus fully described my invention, what I claim therein as new, and desire to secure by Letters Patent, is-- For casting plow-plates or other articles of steel, the use of molds prepared as herein set forth-that is to say, the body of the mold formed of dry sand or loam and its internal surfacecoated with plumbago, both of which substances, previous to being used, to bemoistened with an aquous solution of fire-clay, and the mold, when so made, to be thoroughly baked and dried in an oven or furnace, all substantially as and for the purpose herein described.
JOHN DEERE.
Witnesses:
M. S. PARTRIDGE, M. M. LIVINGSTON.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US41203A true US41203A (en) | 1864-01-12 |
Family
ID=2110771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US41203D Expired - Lifetime US41203A (en) | Improvement in molds for casting steel |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US41203A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030093606A1 (en) * | 2001-10-29 | 2003-05-15 | Sreenath Mambakkam | Multimode controller for intelligent and "dumb" flash cards |
| US20050133860A1 (en) * | 2003-12-17 | 2005-06-23 | Micron Technology, Inc. | Vertical NROM NAND flash memory array |
-
0
- US US41203D patent/US41203A/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030093606A1 (en) * | 2001-10-29 | 2003-05-15 | Sreenath Mambakkam | Multimode controller for intelligent and "dumb" flash cards |
| US20050133860A1 (en) * | 2003-12-17 | 2005-06-23 | Micron Technology, Inc. | Vertical NROM NAND flash memory array |
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