US31051A - Improvement in preparing patterns for molding - Google Patents
Improvement in preparing patterns for molding Download PDFInfo
- Publication number
- US31051A US31051A US31051DA US31051A US 31051 A US31051 A US 31051A US 31051D A US31051D A US 31051DA US 31051 A US31051 A US 31051A
- Authority
- US
- United States
- Prior art keywords
- patterns
- molding
- improvement
- wax
- acid
- 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
- 238000000465 moulding Methods 0.000 title 2
- 239000000203 mixture Substances 0.000 description 16
- 239000001993 wax Substances 0.000 description 16
- 239000002253 acid Substances 0.000 description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 14
- 238000000034 method Methods 0.000 description 12
- 239000011248 coating agent Substances 0.000 description 10
- 238000000576 coating method Methods 0.000 description 10
- 229910052742 iron Inorganic materials 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 229910001018 Cast iron Inorganic materials 0.000 description 6
- 241000779819 Syncarpia glomulifera Species 0.000 description 6
- 229940036248 Turpentine Drugs 0.000 description 6
- 235000013871 bee wax Nutrition 0.000 description 6
- 239000012166 beeswax Substances 0.000 description 6
- 239000001739 pinus spp. Substances 0.000 description 6
- 240000002027 Ficus elastica Species 0.000 description 4
- 240000003936 Plumbago auriculata Species 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000005864 Sulphur Substances 0.000 description 4
- 238000009835 boiling Methods 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- 238000007654 immersion Methods 0.000 description 4
- 239000004615 ingredient Substances 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 229920001195 polyisoprene Polymers 0.000 description 4
- 235000015096 spirit Nutrition 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- 235000011149 sulphuric acid Nutrition 0.000 description 4
- 239000001117 sulphuric acid Substances 0.000 description 4
- 241000272168 Laridae Species 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M NaHCO3 Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 229920000591 gum Polymers 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000009877 rendering Methods 0.000 description 2
- 238000003756 stirring Methods 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
- my invention consists in giving to cast-iron patterns to mold from a very close, hard, smooth, and durable surface, being entirely water-proof, not liable to rust, as it is not affected by the dampness of the moldingroom and is capable of withstanding a great amount of heat.
- the smoothness of the surface of castings depends much upon that of the pattern used in making the mold. When a high degree of perfection is desired the usual process is to make the surface as smooth as possible and then cover it with a very thin coating of beeswax; but this does not protect the iron surface underneath from the weather so as to prevent oxidation.
- composition should then be remelted and well stirred, when sulphur should be added in the proportion of about one-half an ounce to each pound of wax used, when the whole should be well mixed, and it is ready for use.
- the pattern is prepared to receive this composition in the following manner: It is first.
- a very desirable finish can be produced by applying; the compound directly to the east-iron pattern which has not been prepared in the acid.
- the wax may be purified by other means, or it may need no purification.
- the indi'a-ruhber may also be dissolved in some other liquid than spirits of turpentine with perhaps equal success.
- the details of the process above given may be varied without materially affecting the result. I do not therefore limit myself to these precise details; nor do I wish to confine myself to the exact proportions of the ingredients of which my composition consists, as above indicated. These may be considerably varied without materially affecting its utility. All these details and proportions are given to show the manner in which I prefer to form the composition employed by me in carrying out the process which I claim to have invented; but
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Description
- wax coating and clean up the pattern.
UNITED STATE ATENT OFF CE.
HANSON WRIGHT, OF WESTFORD, NEW YORK.
Specification forming part of Letters Patent No. 31,05 l, dated January 1, 186 1.
To all whom it may concern:-
Be it known' that I, HANSON WRIGHT, of the town of Westford, county of Otsego, and State of New York, have invented a new and Improved Process for Finishing Cast-Iron Pat= terns to Mold From; and I do hereby declare that the following is a full and exact description thereof.
The nature of my invention consists in giving to cast-iron patterns to mold from a very close, hard, smooth, and durable surface, being entirely water-proof, not liable to rust, as it is not affected by the dampness of the moldingroom and is capable of withstanding a great amount of heat. The smoothness of the surface of castings depends much upon that of the pattern used in making the mold. When a high degree of perfection is desired the usual process is to make the surface as smooth as possible and then cover it with a very thin coating of beeswax; but this does not protect the iron surface underneath from the weather so as to prevent oxidation. The effect of that oxidation in the first place is to render the surface of the pattern rough, to smooth which such patterns are usually brushed with some kind of coating, which thickens'the patterns, thus rendering the castings heavier than desired, which renders it necessary to remove the These inconveniences are remedied by my improvement.
In order to enable those skilled in the art to make and use my invention, 1 will proceed to state the ingredients used by me for that purpose and the manner in which they are employed.
To a proper quantity of pure india-rubber gum I add enough spirits of turpentine to cut or dissolve the whole. When dissolved I melt the requisite quantity of beeswax, and, in order to purify it, I usually add to it saleratus in the proportion of half of anounce to one pound of wax. I then heat an iron rod red hot and stir and burn the wax till the grease is all burned out, when it will usually cease to is rougher, a larger proportion of rubber will be necessary, so that on coarse castings or patterns as much as two or three ounces to the pound of wax may be necessary to produce the best results. While the wax is in a melted state I add to it the rubber dissolved, as above stated, and, after being allowed to get nearly cool, pour the Whole into a vessel containing water, in which I boil it for about two hours. This boiling separates the spirits of turpentine by evaporating it. The wax, also, by this boiling is hardened and also purified. The salaratus having let the dirt loose, the light dirt and impurities will rise to the top and the heavier will settle to the bottom. The whole should then be set away to cool. When cool the composition will be found on the top or surface of the water, and can be readily removed.
The composition should then be remelted and well stirred, when sulphur should be added in the proportion of about one-half an ounce to each pound of wax used, when the whole should be well mixed, and it is ready for use.
The pattern is prepared to receive this composition in the following manner: It is first.
immersed in dilute sulphuric acid, either hot or cold. This will dissolve a small portion of the iron, and when taken out of the acid it must be washed off in an alkali, to neutralize the acid and leave a cooling of plumbago or carbon in a finely-divided state. If the acid is hot, the immersion should only continue for about one minute. When cold acid is used the immersion should continue much longer. The acid thus applied corrodes and dissolves any sharp points or irregularities which are found upon the surface of the pattern, and the fine powder of plumbago which is left upon the surface unites with and gives body to the composition, which is to be applied in the manner hereinafter described. The patterns should then be heated sufficiently to readily melt the composition when rubbed upon its surface. When the whole surface is well coated with this compound, and while the pattern is still quite hot, I place it in a vessel containing hot water and brush it thoroughly while in the water. This smooths the surface and brings out a polish on the india-ru'ober, which will be found on the surface, and which by this process will dress so close that it seems to be actually in the surface instead of on it.
It is not absolutely necessary that patterns 2 smear,
should be treated with acid in the manner above described. A very desirable finish can be produced by applying; the compound directly to the east-iron pattern which has not been prepared in the acid.
The wax may be purified by other means, or it may need no purification. The indi'a-ruhber may also be dissolved in some other liquid than spirits of turpentine with perhaps equal success. In variousother particulars the details of the process above given may be varied without materially affecting the result. I do not therefore limit myself to these precise details; nor do I wish to confine myself to the exact proportions of the ingredients of which my composition consists, as above indicated. These may be considerably varied without materially affecting its utility. All these details and proportions are given to show the manner in which I prefer to form the composition employed by me in carrying out the process which I claim to have invented; but
. hat I regard as the essential part of my invention, and desire to secure by Letters Patent, is-
l. The process of preparing the surfaces of cast-iron patterns to be molded from by coating the heated surfaces of those patterns with a composition of matter consisting of beeswax, india-rubber, and sulphur, substantially in the manner aboi e set forth.
2. So coating such patterns after they have been previously prepared by immersing them in dilute sulphuric acid, substantially as above described.
HANSON WRIGHT.
Witnesses:
CHAS. MAsON, EDM. F. BROWN.
Publications (1)
Publication Number | Publication Date |
---|---|
US31051A true US31051A (en) | 1861-01-01 |
Family
ID=2100688
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US31051D Expired - Lifetime US31051A (en) | Improvement in preparing patterns for molding |
Country Status (1)
Country | Link |
---|---|
US (1) | US31051A (en) |
-
0
- US US31051D patent/US31051A/en not_active Expired - Lifetime
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