US3770465A - Mold wash composition - Google Patents
Mold wash composition Download PDFInfo
- Publication number
- US3770465A US3770465A US00164030A US3770465DA US3770465A US 3770465 A US3770465 A US 3770465A US 00164030 A US00164030 A US 00164030A US 3770465D A US3770465D A US 3770465DA US 3770465 A US3770465 A US 3770465A
- Authority
- US
- United States
- Prior art keywords
- mold
- mold wash
- wash
- vehicle
- flouride
- 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
- 239000000203 mixture Substances 0.000 title claims abstract description 17
- 239000011230 binding agent Substances 0.000 claims abstract description 9
- SGGPVBOWEPPPEH-UHFFFAOYSA-N [K].[Zr] Chemical group [K].[Zr] SGGPVBOWEPPPEH-UHFFFAOYSA-N 0.000 claims abstract description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 18
- 235000013312 flour Nutrition 0.000 claims description 13
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 9
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 9
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 9
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 7
- 239000005011 phenolic resin Substances 0.000 claims description 7
- 229920001568 phenolic resin Polymers 0.000 claims description 7
- 229910052845 zircon Inorganic materials 0.000 claims description 7
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims description 7
- 239000004615 ingredient Substances 0.000 claims description 6
- 229920001353 Dextrin Polymers 0.000 claims description 5
- 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 claims description 5
- 235000019441 ethanol Nutrition 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 229920001800 Shellac Polymers 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- ZLGIYFNHBLSMPS-ATJNOEHPSA-N shellac Chemical compound OCCCCCC(O)C(O)CCCCCCCC(O)=O.C1C23[C@H](C(O)=O)CCC2[C@](C)(CO)[C@@H]1C(C(O)=O)=C[C@@H]3O ZLGIYFNHBLSMPS-ATJNOEHPSA-N 0.000 claims description 4
- 229940113147 shellac Drugs 0.000 claims description 4
- 235000013874 shellac Nutrition 0.000 claims description 4
- 239000004208 shellac Substances 0.000 claims description 4
- 229920002554 vinyl polymer Polymers 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 22
- 239000002184 metal Substances 0.000 abstract description 22
- 239000000470 constituent Substances 0.000 abstract description 6
- 239000000375 suspending agent Substances 0.000 abstract description 6
- 150000002739 metals Chemical class 0.000 abstract description 3
- 239000000725 suspension Substances 0.000 abstract description 2
- 239000004576 sand Substances 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000005266 casting Methods 0.000 description 6
- 239000003921 oil Substances 0.000 description 5
- 239000010959 steel Substances 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000002585 base Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- -1 ferrous metals Chemical class 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 241001474374 Blennius Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- 229910001060 Gray iron Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 241000407429 Maja Species 0.000 description 1
- YNPNZTXNASCQKK-UHFFFAOYSA-N Phenanthrene Natural products C1=CC=C2C3=CC=CC=C3C=CC2=C1 YNPNZTXNASCQKK-UHFFFAOYSA-N 0.000 description 1
- 241000212342 Sium Species 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- DGEZNRSVGBDHLK-UHFFFAOYSA-N [1,10]phenanthroline Chemical group C1=CN=C2C3=NC=CC=C3C=CC2=C1 DGEZNRSVGBDHLK-UHFFFAOYSA-N 0.000 description 1
- NYAWADGYOWCCLK-UHFFFAOYSA-N [Na].[Zr] Chemical compound [Na].[Zr] NYAWADGYOWCCLK-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000001464 adherent effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- DNEHKUCSURWDGO-UHFFFAOYSA-N aluminum sodium Chemical compound [Na].[Al] DNEHKUCSURWDGO-UHFFFAOYSA-N 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000008119 colloidal silica Substances 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000008121 dextrose Substances 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 235000010413 sodium alginate Nutrition 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000009974 thixotropic effect Effects 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
- Prior art mold washes such as disclosed in U. S. Pat. Nos. 3,121,269 and 3,21 1,560, are painted or sprayed on the mold cavity surface and dried to form a continuous refractory surface over the sand or metal. These washes can be mechanically cracked prior to casting of the metal with the result that the molten metal enters cavities in the refractory to contact the sand or metal mold surfaces. lnthe sand molds, iron, steel or other high melting point metal produces a dense, very adherent mixture of metal and entrapped sand on the surface of the casting which is difficult and expensive to remove. In the case of cast iron or steel molds, the ingots become difficult to strip and generally contain surface defects. These defects require extensive salvaging operations such as chipping, grinding, burning or machining, thereby decreasing production and increasing cost of the castings or ingots poured.
- the mold washes of the present invention are unique in that the volatile additive reacts under the heat of the molten metal to form a continuous refractory surface on the mold cavity.
- compositional ranges of the present invention are:
- compositional ranges are for the dry ingredients which are normally suspended in a vehicle such as water, isopropyl alcohol, ethyl alcohol, methyl alcohol, naphtha, or mixtures thereof.
- the preferred suspension agent is one thatyexhibits I thixotropic properties so that settling is inhibited and the wash can easily be applied.
- a seaweed extract called carrageenen is particularly effective as a suspension agent.
- Sodium alginates and bentonite clays have also been effective.
- Colloidal silica and fly-ash from a coal fired electricalgenerating station are satisfactory suspension agents.
- a preferred binder is phen ol formaldehyde (phenolic resin).
- Shellac flakes in alcohol vehicle
- drying oils known in the trade as core oils, dextrine, polyvinylpyrolidone and mixtures thereof and with the phenolic resin are also very effective binders.
- Refractory bases include zircon flour, chromium ore, silica flour, graphite, aluminum oxide, and mixtures thereof.
- sium chromium flouride and the preferred potassium zirconium flouride. It is also' possible to use a metal such as magnesium that is readily volatilized and forms a refractory oxide on the mold cavity surface.
- a series of mold washes were formulated and tested in a mold using molten gray iron.
- the wash is placed on' a core made from a mixture of:
- the washes of Table I were formulated and numbers 1 through 8 were dispersed in water as a vehicle whereas numbers 9 and 10 were dispersed in an ethyl alcohol vehicle.
- the ratio of dry ingredients to vehicle should range from 1 k 3 'rto l by volume depending upon the method of application, a good spray mixture being 2 1a; 1 respectively.
- silica flour can be substituted for zircon flour in the ration of 1 part silica flour for 2 parts zircon flour, serving as both a refractory and a suspension agent.
- hydrated aluminum chloride can be used alone or in combination with the phenolic-polyvinylpyrolidone system as a binder agent.
- the key is the volatile constituent that reacts to form a refractory oxide.
- the balance of the composition provides the medium as needed for this reaction to take place.
- Dry ingredient mixture for a mold wash for use in preventing intrusion of molten metal into surface openings on a foundry core or ingot mold consisting essentially of 0.25 to 95 percent potassium zirconium flouride; 0.2 to 20 percent of a binder selected from the group consisting of phenolic resin, dextrine, shellac, drying oil, and polyvinylpyrolidone; balance zircon flour.
- a maia'wah' eonstsrmgsrmts '10 percent by weight binder selected from the group consisting of phenolic resin, dextrine, shellac, drying oil, and polyvinyl pyrolidene and 98 to percent by weight potassium zirconium flouride.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
A mold wash consisting of a vehicle wherein there is held in suspension a mixture of a refractory base, a suspension agent, a binder and a readily volatilized constituent selected from the group consisting of metals and complex metal flourides. The wash is characterized in that the readily volatilized constituent reacts to form a refractory. A preferred constituent is potassium zirconium flouride.
Description
United States Patent 1 Howells a 1 Nov. 6, 1973 1 MOLD WASH COMPOSITION [75] Inventor: Norman C. Howells, Conneaut, Ohio [73] Assignee: Exomet, lncorporated,Conneaut,
Ohio
221 Filed: July 19,1971
211 Appl.No.: 164,030
[52] US. Cl l06/38.23, 106/38.24, 106/38.25, 106/214, 106/237, 106/238, 106/241,
[51] Int. Cl B28b 7/38 [58] Field of Search l06/38.22, 38.23, 106/38.24, 38.27, 38.5 R, 38.5 D, 38.25, 214,
[56] References Cited UNITED STATES PATENTS 1,725,039 8/1929 Williams 106/38.27
2,652,312 8/1953 Fink'..'; l06/38.5 D 3,081,177 3/1963 Garay et a1. 106/38.5 D 3,212,145 [0/1965 Green 1 [06/3822 3,275,460 9/1966 .lcanneret 106/38.22
Primary Examiner-L0renz0 B. Hayes Att0rneyRonald B. Sherer et al.
57 ABSTRACT 5 Claims, N0 Drawings BACKGROUND OF THE INVENTION This invention pertains to the art of metal founding. In the foundry and the steel mill, it is common practice to coat the interior surfaces of the mold with a wash to prevent intrusion of the molten metal into pores, cracks and the like on the surfaces of the mold cavity that will contact molten metal. Mold washes, as the coatings are commonly called, are applied to sand mold cavities for making castings of a specific shape as well as to the interior of iron ingot molds used in the steel mill.
Prior art mold washes, such as disclosed in U. S. Pat. Nos. 3,121,269 and 3,21 1,560, are painted or sprayed on the mold cavity surface and dried to form a continuous refractory surface over the sand or metal. These washes can be mechanically cracked prior to casting of the metal with the result that the molten metal enters cavities in the refractory to contact the sand or metal mold surfaces. lnthe sand molds, iron, steel or other high melting point metal produces a dense, very adherent mixture of metal and entrapped sand on the surface of the casting which is difficult and expensive to remove. In the case of cast iron or steel molds, the ingots become difficult to strip and generally contain surface defects. These defects require extensive salvaging operations such as chipping, grinding, burning or machining, thereby decreasing production and increasing cost of the castings or ingots poured.
BRIEF DESCRIPTION OF THE INVENTION In order to avoid the above described problems and produce an improved mold wash, it has been discovered that when a readily volatilized metal or metal compound component, that reacts under heat to form a refractory oxide, is added to a basic w, mixture of a refractory base, binder, and suspension and the dry mix suspended in a suitable vehicle is applied to the mold surfaces, high melting point metals can be successfully cast relatively free of gross surfaces defects. The wash reacts under heat liberated by the metal entering the mold to prevent intrusion of metal into discontinuities in the mold cavity surface by forming a refractory oxide.
Therefore, it is the primary object of this invention to provide an improved mold wash. 1
It is another object of this invention to provide a mold wash useful for casting metals having high melting points.
It is a further object of this invention to provide a mold wash for use in mold cavities of sand or iron used for the casting of ferrous metals.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT The mold washes of the present invention are unique in that the volatile additive reacts under the heat of the molten metal to form a continuous refractory surface on the mold cavity.
The broad compositional ranges of the present invention are:
% by weight Suspension agent 0-6 Binder 0.2- Volatile Constituent 0.25-95 Base 0-98 The above compositional ranges are for the dry ingredients which are normally suspended in a vehicle such as water, isopropyl alcohol, ethyl alcohol, methyl alcohol, naphtha, or mixtures thereof.
The preferred suspension agent is one thatyexhibits I thixotropic properties so that settling is inhibited and the wash can easily be applied. A seaweed extract called carrageenen is particularly effective as a suspension agent. Sodium alginates and bentonite clays have also been effective. Colloidal silica and fly-ash from a coal fired electricalgenerating station are satisfactory suspension agents.
A preferred binder is phen ol formaldehyde (phenolic resin). Shellac flakes (in alcohol vehicle), drying oils known in the trade as core oils, dextrine, polyvinylpyrolidone and mixtures thereof and with the phenolic resin are also very effective binders.
Refractory bases include zircon flour, chromium ore, silica flour, graphite, aluminum oxide, and mixtures thereof.
- aluminum flouride, sodium aluminum flouride, potas- In order for mold washes of the present invention to succeed, they must contain a readily volatile ingredient that will react to form a refractory oxide to adhere to mold cavity surfaces or react with the mold cavity surface to form the refractory oxide.
sium chromium flouride, and the preferred potassium zirconium flouride. It is also' possible to use a metal such as magnesium that is readily volatilized and forms a refractory oxide on the mold cavity surface.
A series of mold washes were formulated and tested in a mold using molten gray iron. The wash is placed on' a core made from a mixture of:
3% Phenolic resin 3% Dextrose with amonia salt 1% Gelatinized corn flour 5% Water 88% Sand The cores in the form of sticks were baked and the wash applied in a wet coating about 1/32 inch thick. After coating, the cores were rammed in place at the bottom of a mold cavity about 7 inches in diameter and about'30 inches high, the cavity being bottom gated. Molded exothermic riser sleeves were used in the cavity to lengthen the time that the 15 to 30-inch high column of metal would be molten. The longer contact time for the molten metal to the core provides a more rigourous test than normally used in the foundry.
Table I sets forth a series of washes that were used in the foregoing core test and showed no penetration of Wash No. (percent by weight) Constituent l 2 3 4 Carrugeenen Colloidal silicu.. Fly ash Phenolic resin Dextrine tttttt She|lac..... Core oil ttttttttttttttt Polyvinykpyrolidone.
K rlw;
Zircon flour. Chrome ore....
The washes of Table I were formulated and numbers 1 through 8 were dispersed in water as a vehicle whereas numbers 9 and 10 were dispersed in an ethyl alcohol vehicle. The ratio of dry ingredients to vehicle should range from 1 k 3 'rto l by volume depending upon the method of application, a good spray mixture being 2 1a; 1 respectively. In wash No. 9, silica flour can be substituted for zircon flour in the ration of 1 part silica flour for 2 parts zircon flour, serving as both a refractory and a suspension agent.
In Table l washes 1-5 were also effective when tested on the interior surface of a cast iron ingot mold into which a ferrous melt was poured.
It has also been shown that in wash No. 9, hydrated aluminum chloride can be used alone or in combination with the phenolic-polyvinylpyrolidone system as a binder agent.
In all of the washes the key is the volatile constituent that reacts to form a refractory oxide. The balance of the composition provides the medium as needed for this reaction to take place.
Other volatile flourides, such as sodium zirconium flouride, can be used.
Having thus described my invention, the following is desired to be secured by Letters Patent of the United States.
I claim:
1. Dry ingredient mixture for a mold wash for use in preventing intrusion of molten metal into surface openings on a foundry core or ingot mold consisting essentially of 0.25 to 95 percent potassium zirconium flouride; 0.2 to 20 percent of a binder selected from the group consisting of phenolic resin, dextrine, shellac, drying oil, and polyvinylpyrolidone; balance zircon flour.
2. A mold wash containing the dry mix .according to claim 1 dissolved in a vehicle selected from the group consisting of water, ethyl alcohol, isopropyl alcohol, methyl alcohol and mixtures thereof.
3. A mold wash according to claim 1 wherein silica flour is substituted for zircon flour on a 1 to 2 ratio respectively.
4. A mold wash according to claim 2 wherein the 1 1/2 to 3 1/2 parts dry ingredients are mixed with'l part vehicle.
A maia'wah' eonstsrmgsrmts '10 percent by weight binder selected from the group consisting of phenolic resin, dextrine, shellac, drying oil, and polyvinyl pyrolidene and 98 to percent by weight potassium zirconium flouride.
Claims (4)
- 2. A mold wash containing the dry mix according to claim 1 dissolved in a vehicle selected from the group consisting of water, ethyl alcohol, isopropyl alcohol, methyl alcohol and mixtures thereof.
- 3. A mold wash according to claim 1 wherein silica flour is substituted for zircon flour on a 1 to 2 ratio respectively.
- 4. A mold wash according to claim 2 wherein the 1 1/2 to 3 1/2 parts dry ingredients are mixed with 1 part vehicle.
- 5. A mold wash consisting of 2 to 10 percent by weight binder selected from the group consisting of phenolic resin, dextrine, shellac, drying oil, and polyvinyl pyrolidene and 98 to 90 percent by weight potassium zirconium flouride.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US16403071A | 1971-07-19 | 1971-07-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3770465A true US3770465A (en) | 1973-11-06 |
Family
ID=22592670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US00164030A Expired - Lifetime US3770465A (en) | 1971-07-19 | 1971-07-19 | Mold wash composition |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US3770465A (en) |
| CA (1) | CA982753A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4088624A (en) * | 1975-12-26 | 1978-05-09 | Societe D'applications De Procedes Industriels Et Chimiques S.A.P.I.C. | Self-hardening molding compositions |
| WO2007101528A1 (en) * | 2006-03-07 | 2007-09-13 | Ks Aluminium-Technologie Ag | Mold release layer for casting nonferrous metals |
| US20090095439A1 (en) * | 2005-09-02 | 2009-04-16 | Ashland-Sudchemie-Kernfest Gmbh | Borosilicate glass-containing molding material mixtures |
| US20100101747A1 (en) * | 2008-10-24 | 2010-04-29 | Michael Tomczak | Mold used in manufacture of drill bits and method of forming same |
| CN103878299A (en) * | 2014-03-03 | 2014-06-25 | 珠海市斗门福联造型材料实业有限公司 | Sintered strippable light-colored casting coating and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1725039A (en) * | 1926-02-13 | 1929-08-20 | Electro Metallurg Co | Production of alloy-surface castings |
| US2652312A (en) * | 1952-12-23 | 1953-09-15 | Plastodent Inc | Dental impression material |
| US3081177A (en) * | 1962-01-25 | 1963-03-12 | J Bird Moyer Co Inc | Dental impression compositions |
| US3212145A (en) * | 1963-04-12 | 1965-10-19 | United States Steel Corp | Mold coating and method of pouring ingots |
| US3275460A (en) * | 1964-11-23 | 1966-09-27 | Foseco Int | Mold dressings for use in foundry practice |
-
1971
- 1971-07-19 US US00164030A patent/US3770465A/en not_active Expired - Lifetime
-
1972
- 1972-07-19 CA CA147,468A patent/CA982753A/en not_active Expired
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1725039A (en) * | 1926-02-13 | 1929-08-20 | Electro Metallurg Co | Production of alloy-surface castings |
| US2652312A (en) * | 1952-12-23 | 1953-09-15 | Plastodent Inc | Dental impression material |
| US3081177A (en) * | 1962-01-25 | 1963-03-12 | J Bird Moyer Co Inc | Dental impression compositions |
| US3212145A (en) * | 1963-04-12 | 1965-10-19 | United States Steel Corp | Mold coating and method of pouring ingots |
| US3275460A (en) * | 1964-11-23 | 1966-09-27 | Foseco Int | Mold dressings for use in foundry practice |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4088624A (en) * | 1975-12-26 | 1978-05-09 | Societe D'applications De Procedes Industriels Et Chimiques S.A.P.I.C. | Self-hardening molding compositions |
| US20090095439A1 (en) * | 2005-09-02 | 2009-04-16 | Ashland-Sudchemie-Kernfest Gmbh | Borosilicate glass-containing molding material mixtures |
| WO2007101528A1 (en) * | 2006-03-07 | 2007-09-13 | Ks Aluminium-Technologie Ag | Mold release layer for casting nonferrous metals |
| US20090050288A1 (en) * | 2006-03-07 | 2009-02-26 | Manfred Laudenklos | Form release layer for the casting nonferrous metals |
| CN101500729B (en) * | 2006-03-07 | 2011-08-03 | Ks铝技术有限公司 | Release layer for casting of non-ferrous metals |
| US8403024B2 (en) | 2006-03-07 | 2013-03-26 | Ks Aluminium-Technologie Gmbh | Form release layer for the casting nonferrous metals |
| US20100101747A1 (en) * | 2008-10-24 | 2010-04-29 | Michael Tomczak | Mold used in manufacture of drill bits and method of forming same |
| CN103878299A (en) * | 2014-03-03 | 2014-06-25 | 珠海市斗门福联造型材料实业有限公司 | Sintered strippable light-colored casting coating and preparation method thereof |
| CN103878299B (en) * | 2014-03-03 | 2016-11-02 | 珠海市斗门福联造型材料实业有限公司 | A kind of sintering stripping type light-colored casting coating and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CA982753A (en) | 1976-02-03 |
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