US1363384A - Process of casting freely-oxidizable metals - Google Patents
Process of casting freely-oxidizable metals Download PDFInfo
- Publication number
- US1363384A US1363384A US351679A US35167920A US1363384A US 1363384 A US1363384 A US 1363384A US 351679 A US351679 A US 351679A US 35167920 A US35167920 A US 35167920A US 1363384 A US1363384 A US 1363384A
- Authority
- US
- United States
- Prior art keywords
- casting
- freely
- sand
- mold
- metal
- 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 23
- 229910052751 metal Inorganic materials 0.000 title description 20
- 239000002184 metal Substances 0.000 title description 20
- 238000000034 method Methods 0.000 title description 8
- 150000002739 metals Chemical class 0.000 title description 7
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 11
- 229910052749 magnesium Inorganic materials 0.000 description 11
- 239000011777 magnesium Substances 0.000 description 11
- 239000004576 sand Substances 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 239000007788 liquid Substances 0.000 description 7
- 239000003110 molding sand Substances 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 229910000722 Didymium Inorganic materials 0.000 description 1
- 241000224487 Didymium Species 0.000 description 1
- 229910001268 Ferrocerium Inorganic materials 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 229910001122 Mischmetal Inorganic materials 0.000 description 1
- 241000212342 Sium Species 0.000 description 1
- 239000010775 animal oil Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/02—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
Definitions
- the object of the invention is to provide a process of making castings of freely oxidizable metals whereby the castings will not become oxidizedv during'the casting opera-' tion.
- My invention is predicated upon my discoveries of the cause of such burning, and of how a clean sound magnesium casting can be made following ordinary foundry practices. I have discovered firstthat the burning or oxidization of the magnesium is due to the presence of water in the molding sand, the molten metal disassociating the water into its constituent elements and the thus freed oxygen combining with the magnesium; and secondly, that sound clean castings of magnesium can be made by freeing the molding sand of water and rendering it moldable by mixing it with a non-aqueous liquid.
- the molding sand may be dried in, any desired manner. It is then. mixed with sufficient nonaqueous liquid to give it the desired hys1- hile cal properties for molding urposes.
- various liquids may be used: such as animal, vegetable and mineral oils, I have found that a heavy petroleum hydro-carbon lubricating oil gives very satisfactory results.
- a mold may be made in the usual way, and the mag- Specification of Letters Patent.
- the sand may be used to dry sand molding in which the molding sand, first freed from Water, is mixed with g a non-aqueous binder and then molded and
- the invention is applicable to the casting of freely oxidizable metals other than magnesium.
- the invention is not limited to the casting of pure, or even substantially pure, freelyoxidizable metals, but that it is fully appli cable to alloys, such as aluminum-magne-' sium and ferro-cerium alloys, in which the freely-oxidizable metal constituent is 'pres-' ent in such proportions as will render the casting liable 'to destructive oxidization if made in a water-moistened sand mold.
- the freely-oxidizable metal contemplated in each of the appended claims includes pure metal as well as alloys thereof having oxidizing characteristics similar to the pure metal.
- the rocess of making a magnesium casting, w ich consists in forming a mold from sand freed from Water and rendered 10:
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Description
UNITED STATES PATENT OFFICE.
HERMAN E. BAKKEN, OF NEW KENSINGTON, PIEITNSYLVANIA, ASSIGNOBTO ALUMI- NUM COMPANY. OF AMERICA, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF SYLVANIA.
PROCESS OF CASTING FBEELY-OXIDIZABLE METALS.
1,363,384.. No Drawing.
To all whom wit-may concern.
'a resident of New' Kensington, in the county I of Allegheny and State of Pennsylvania,
have invented a new and useful Improvement in Processes of Casting F reely-Oxidizable Metals, of which the following is a specification.
The object of the invention is to provide a process of making castings of freely oxidizable metals whereby the castings will not become oxidizedv during'the casting opera-' tion.
While the invention is adapted to the casting of various freely oxidizable metals, such as misch-metal and its constituents, cerium, lanthanum, didymium, etc., it finds particular applicability to the casting ofmagnesium, and will be so explained in the following description.
Attempts heretofore made to cast magnesium in ordinary molding sand have met with failure due to the fact that the magnesium, when so cast, catches fire and becomes wholly or partially oxidized. This peculiar behavior has been attributed to a reaction between the magnesium and thesan'd.
My invention is predicated upon my discoveries of the cause of such burning, and of how a clean sound magnesium casting can be made following ordinary foundry practices. I have discovered firstthat the burning or oxidization of the magnesium is due to the presence of water in the molding sand, the molten metal disassociating the water into its constituent elements and the thus freed oxygen combining with the magnesium; and secondly, that sound clean castings of magnesium can be made by freeing the molding sand of water and rendering it moldable by mixing it with a non-aqueous liquid.
In the practice of the invention, the molding sand may be dried in, any desired manner. It is then. mixed with sufficient nonaqueous liquid to give it the desired hys1- hile cal properties for molding urposes. various liquids may be used: such as animal, vegetable and mineral oils, I have found that a heavy petroleum hydro-carbon lubricating oil gives very satisfactory results. After the sand has been thoroughly mixed with and rendered moldable by the oil, a mold may be made in the usual way, and the mag- Specification of Letters Patent.
baked in the usual manner.
metal in'said mold. v
process of making a casting of Patented Dec. 28, 1920.
Application filed January 15, 1920. Serial No. 351,679.
nesium cast into it. The sand may be used to dry sand molding in which the molding sand, first freed from Water, is mixed with g a non-aqueous binder and then molded and As previously stated, the invention is applicable to the casting of freely oxidizable metals other than magnesium. I desire to have itclearly understood, also, that the invention is not limited to the casting of pure, or even substantially pure, freelyoxidizable metals, but that it is fully appli cable to alloys, such as aluminum-magne-' sium and ferro-cerium alloys, in which the freely-oxidizable metal constituent is 'pres-' ent in such proportions as will render the casting liable 'to destructive oxidization if made in a water-moistened sand mold. Ac-
cordingly, the freely-oxidizable metal contemplated in each of the appended claims includes pure metal as well as alloys thereof having oxidizing characteristics similar to the pure metal. I claim:
1. The process of making a casting of 5 freely oxidizable metal, which consists 111 forming a mold from sand freed from water and rendered moldable b being mixed with a non-aqueous liquid, an casting said metal in said mold.
2. The process of making a casting of freely oxidizable metal, which. consists in forming a green sand mold from sand freed from water and rendered moldable by bein mixed with a heavy oil, and casting sai 'freely'oxidizable metal, which consists in forming a green sand mold from sand freed from water and rendered moldable by' being mixed with a non-aqueous liquid, and casting said metal in said green sand mold.
4. The rocess of making a magnesium casting, w ich consists in forming a mold from sand freed from Water and rendered 10:
moldable by being mixed with a non-aqueous liquid, and casting molten magnesium in said mold.
5. The process of making a casting of a In testimony whereof I have hereunto set metal contaminga considerable proportion my hand.
, of magnesium which consists in forming a.
mold from said freed from water and ren- HERMAN BAKKEN' dered moldable by being mixed with a non- Witnesses: aqueous liquid, and casting the molten metal FRANCIS C. FRARY,
in the said mold. H. V. CHURCHILL.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US351679A US1363384A (en) | 1920-01-15 | 1920-01-15 | Process of casting freely-oxidizable metals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US351679A US1363384A (en) | 1920-01-15 | 1920-01-15 | Process of casting freely-oxidizable metals |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1363384A true US1363384A (en) | 1920-12-28 |
Family
ID=23381896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US351679A Expired - Lifetime US1363384A (en) | 1920-01-15 | 1920-01-15 | Process of casting freely-oxidizable metals |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1363384A (en) |
-
1920
- 1920-01-15 US US351679A patent/US1363384A/en not_active Expired - Lifetime
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