US34524A - Improvement in preparing metallic molds for casting metals - Google Patents
Improvement in preparing metallic molds for casting metals Download PDFInfo
- Publication number
- US34524A US34524A US34524DA US34524A US 34524 A US34524 A US 34524A US 34524D A US34524D A US 34524DA US 34524 A US34524 A US 34524A
- Authority
- US
- United States
- Prior art keywords
- mold
- improvement
- casting
- bronze
- casting metals
- 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
- 238000005266 casting Methods 0.000 title description 20
- 239000002184 metal Substances 0.000 title description 18
- 229910052751 metal Inorganic materials 0.000 title description 18
- 150000002739 metals Chemical class 0.000 title 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 36
- 229910000906 Bronze Inorganic materials 0.000 description 24
- 239000010974 bronze Substances 0.000 description 24
- 239000011248 coating agent Substances 0.000 description 18
- 238000000576 coating method Methods 0.000 description 18
- 229910052742 iron Inorganic materials 0.000 description 18
- 239000004927 clay Substances 0.000 description 8
- 229910052570 clay Inorganic materials 0.000 description 8
- 239000012530 fluid Substances 0.000 description 6
- 238000000137 annealing Methods 0.000 description 4
- MJBPUQUGJNAPAZ-AWEZNQCLSA-N butin Chemical compound C1([C@@H]2CC(=O)C3=CC=C(C=C3O2)O)=CC=C(O)C(O)=C1 MJBPUQUGJNAPAZ-AWEZNQCLSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 241000779819 Syncarpia glomulifera Species 0.000 description 2
- 229940036248 Turpentine Drugs 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- REDXJYDRNCIFBQ-UHFFFAOYSA-N aluminium(3+) Chemical class [Al+3] REDXJYDRNCIFBQ-UHFFFAOYSA-N 0.000 description 2
- 239000002956 ash Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 231100000078 corrosive Toxicity 0.000 description 2
- 231100001010 corrosive Toxicity 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 235000013601 eggs Nutrition 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000006233 lamp black Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000001590 oxidative Effects 0.000 description 2
- 239000001739 pinus spp. Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 235000015096 spirit Nutrition 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910052718 tin Inorganic materials 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N tin hydride Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
Images
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
- N-PEERS PHOTO-LITHOGRAPHER WASHINGTON D C lUNrTnn VSTATES PATENT Ormea.
- the mold after being formed of the required shape is to be thoroughly annealed, so that its inside surface shall have the appearance of burnt iron.
- Such inner surface is next to be .washed with a hydrated solution of pulverized clay and wood-ashes until the pores of the iron are completely lled, and such acoating formed upon it as to entirely prevent any contact of the metallic surface with the melted bronze during the process of founding.
- a coating of lamp -black dissolved in spirits of turpentine or alcohol is next to be applied, or instead thereof a liquid resinous substance-such as tar-may be used.
- the object of annealing the mold and oxidizing its inner surface by heat, as described, is not only to prevent the mold from suddenly cracking or breaking While it may be receiv- Y l. lng hot metal or may contain the same, but to strongly to the mold, and fill its pores to advantage.
- the resinous Wash or second. coating will gradually liquefy and burn, and thus will prevent 4the metal from setting or hardening against the surface of the mold until y the mold may have received its proper quantity of metal.
- the metahwhile fluid in the mold will be preserved in 'a homogeneous state, whereby the oxides and extraneous matter which so readily form or collect in fluid bronze will freely flow tothe upv per part or head of the casting without adhering to the sides of the mold.
- the metal By preventing the metal fromA setting or adhering to the sides of the mold until the oxides and extraneous matter have had time to rise into the head of the casting the metal is enabled to become properly and evenly compacted preparatory to and while passing from afluid to a solid state.
- That I claim as my invention or improvement in preparing a metallic mold for casting ordnance or articles of bronze consists not only in heating the mold, so as to anneal it and burn and oxidize its inner surface, butin afterward applying to the said surface the earthy Wash and to the latter a resinous coating, substantially as hereinbefore specified.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Description
N-PEERS, PHOTO-LITHOGRAPHER WASHINGTON D C lUNrTnn VSTATES PATENT Ormea.
JOHN BEVERE, OF BOSTON, MASSACHUSETTS.
IMPROVEMENT IN PREPARING METALLIC MOLDS vFOFI CASTING METALS.4
Specification forming part of Letters Patent No. 34,5211, dated February 25, 1862 antedated November 22, 1861.
To all whom it may concern.-
Beit known thatI, JOHN REVERE, of Boston, in the county of Suffolk and State of Massachusetts, have invented a new and useful Improvement in Casting Bronze Ordnance or other Articles; and I do hereby declare the same to be fully described in the following specification.
It is a fact well known to manufacturers of bronze articles, especially those composed of a large amount of metal, that either owing to the repulsion or want of affinity between copper and iron or steel, or for some other cause, it has hitherto been considered impossible to makea good sound casting of bronze in an iron mold, and in consequence thereof all heavy bronze articles are now cast or founded in baked-clay or dry-sand molds. This method is not only very expensive, but is a very slow and tedious one. To find a remedy for these evils has been the object of my invention, and has been the result of a long series of experiments pursued for a considerable length of time.
In carrying` out my invention I construct the mold or material in which the article is to be cast of iron, and I prefer to make the same in two or more parts, which are to be confined together by means of iron clamps or other suitable devices.
The mold after being formed of the required shape is to be thoroughly annealed, so that its inside surface shall have the appearance of burnt iron. Such inner surface is next to be .washed with a hydrated solution of pulverized clay and wood-ashes until the pores of the iron are completely lled, and such acoating formed upon it as to entirely prevent any contact of the metallic surface with the melted bronze during the process of founding. Over such coating, and while the mold is in a warm state, a coating of lamp -black dissolved in spirits of turpentine or alcohol is next to be applied, or instead thereof a liquid resinous substance-such as tar-may be used.
In casting a piece of ordnance or other article I pour the molten bronze into a long tunnel extending down some distance into the mold, so that the liquid mass shall fall directly into or upon the center of the bottom of the mold, and continue pouring in until the mold is completely filled, care being taken that none of the molten bronze shall come in contact with the resinous coating on the unfilled portion of the mold until it shall impinge against the same as it (the molten massl rises upward in the process of filling the mold.
By my improved mode of annealing theiron mold and applying to the inner surface the coatings as above described I have been able to cast cannons and other articles whose outer surfaces w ere almost, if not entirely, free of air-holes or honcy-comb,7 as they are technically termed, which it is utterly impossible to do by using an iron mold without applying such coatings.
By my improvement the cost of casting a cannon or other article of bronze is lessened fully one-half in comparison with the ordinaryA method, as all the expense attending the making of the clay molds, the molding material, the flasks, the baking of the molds, and the ovens for baking the same is avoided.
Another important advantage attained by my improvement is the rapid and almost instantaneous cooling of the melted bronze,
whereby a separation ofthe tin from the alloy is prevented-an evil familiar to all manufacturers of bronze articles by the old method.
I am aware that molds have been made of metal, and had their inner surfaces coated with red ocher andwhite of eggs, the said coating being not only to prevent the casting, when made in the mold, from adhering to it, but to give to such casting a smooth surface.
I am also aware that a metallic chill constituting part of a mold has been thinly coated With a mixture of black-lead and clay, the ob ject of such coating being to prepare the iron chill for resisting the abrading or corrosive action of the molten cast-iron while the latter may be flowing rapidly in a current around and within the mold. I therefore claim no such means of preparing the inner surface of a mold 5 nor do I claim coveringthe innersur face of a mold with a coating.
In carrying out my inventionIdo more than merely coat the mold with any such means, as I first anneal the iron mold and burn or oxidate its inner surface, whereby I prepare it for the reception of its first coating, to which after having been properly laid on, I apply a second and different cooating-viz., a resinous Wash, as described.
The object of annealing the mold and oxidizing its inner surface by heat, as described, is not only to prevent the mold from suddenly cracking or breaking While it may be receiv- Y l. lng hot metal or may contain the same, but to strongly to the mold, and fill its pores to advantage.
During the use of the ybronze or fluid metal in the mold the resinous Wash or second. coating will gradually liquefy and burn, and thus will prevent 4the metal from setting or hardening against the surface of the mold until y the mold may have received its proper quantity of metal. By this means the metahwhile fluid in the mold,will be preserved in 'a homogeneous state, whereby the oxides and extraneous matter which so readily form or collect in fluid bronze will freely flow tothe upv per part or head of the casting without adhering to the sides of the mold. By preventing the metal fromA setting or adhering to the sides of the mold until the oxides and extraneous matter have had time to rise into the head of the casting the metal is enabled to become properly and evenly compacted preparatory to and while passing from afluid to a solid state.
That I claim as my invention or improvement in preparing a metallic mold for casting ordnance or articles of bronze consists not only in heating the mold, so as to anneal it and burn and oxidize its inner surface, butin afterward applying to the said surface the earthy Wash and to the latter a resinous coating, substantially as hereinbefore specified.
JNO. REVERE. Vitnesses:
S. T. SNOW, WM. T. Fos'rnn..
Publications (1)
Publication Number | Publication Date |
---|---|
US34524A true US34524A (en) | 1862-02-25 |
Family
ID=2104107
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US34524D Expired - Lifetime US34524A (en) | Improvement in preparing metallic molds for casting metals |
Country Status (1)
Country | Link |
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US (1) | US34524A (en) |
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- US US34524D patent/US34524A/en not_active Expired - Lifetime
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