US1453593A - Coating for metal molds - Google Patents
Coating for metal molds Download PDFInfo
- Publication number
- US1453593A US1453593A US581239A US58123922A US1453593A US 1453593 A US1453593 A US 1453593A US 581239 A US581239 A US 581239A US 58123922 A US58123922 A US 58123922A US 1453593 A US1453593 A US 1453593A
- Authority
- US
- United States
- Prior art keywords
- coating
- mold
- refractory
- fire clay
- castings
- 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
- 238000000576 coating method Methods 0.000 title description 27
- 239000011248 coating agent Substances 0.000 title description 23
- 239000002184 metal Substances 0.000 title description 8
- 229910052751 metal Inorganic materials 0.000 title description 8
- 239000004927 clay Substances 0.000 description 16
- 238000005266 casting Methods 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 239000011230 binding agent Substances 0.000 description 7
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000004115 Sodium Silicate Substances 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 229910052911 sodium silicate Inorganic materials 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 4
- 239000006233 lamp black Substances 0.000 description 4
- 238000013021 overheating Methods 0.000 description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000011819 refractory material Substances 0.000 description 3
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 229910001060 Gray iron Inorganic materials 0.000 description 2
- 230000001464 adherent effect Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 102000007469 Actins Human genes 0.000 description 1
- 108010085238 Actins Proteins 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005058 metal casting Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000012047 saturated solution Substances 0.000 description 1
- 239000000126 substance Substances 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
- fire clay As this most refractory coating prevents the overheating of the molds and acting as an insulator as well as a refractory coating. Overheating is objectionable because it limits the thickness of the lamp black coating that y can be applied and so still further increases the overheating.
- Various methods have been proposed for makingfire clay adhere as a smooth non-blistering coating.- I have discovered that if finely ground fire clay be mixed with Water glass, which is the trade name of a solution of sodium silicate in water, and if this mixture of fire clay and sodium silicate solution be applied to a heated metal surface the water evaporates and the sodium silicate acts as a binder for the particles of fire clay.
- This coating is both tenacious and refractory, the silicate giving it its tendency and the fire clay its refractory and insulating properties. I have found that with this coating I can pour iron at a temperature of 2500 F. continuously at atemperature of 2500 F. continuously and repeatedly without overheating the molds providing a thick coating of lamp black is maintained on the coating.
- the coating is Application filed August 11, 1922. Serial No. 581,239.
- gray iron castings particularly adapted for use in the production of unchilled iron castings commonly known in the trade as gray iron castings.
- the surface of the cast iron or other metal molds being cleaned is first heated to approximately 350 F. and then the solution prepared as described above is applied with a brush, four or five coatings being applied quickly so that a substantial thickness of sodium silicate and fire clay is formed on the surface of the molds.
- a coating for protecting iron molds consisting of an inert refractory insulating material, and a small percentage of solublesilicate actin as a binder only for the refractory insu ating material.
- An insulating refractory wash for coating iron molds consisting of fire clay powder suspended in water, in which there is dissolved a small percentage. of soluble silicate.
- a coating for protecting iron mold surfaces consisting of an insulating refractory material mixed with water and a heat resisting binder, said coating being adapted to resist a temperature of at least2000 F.
- a mold. for metal castings comprising a cast iron body havin a mold cavity and a refractory lining or the surface of the mold cavity consisting of a mixture of refractory material and a binder of soluble silicate.
- a metal mold having its mold surface coated when heated with a Wash containing a refractory insulating material mixed with a heat resisting adhesive, and being adapted to resist a temperature of at least 2000 F.
- a metal mold having its mold surfacecoated when heated with a wash containing a fire clay mixed with a heat resisting adhesive, and being adapted to resist a temperature of at least 2000 F.
- a mold for castings con'iprising a mold body having a cavity, an insulating refractory coating for the mold cavity adapted to v resist a minimum temperature of 2000 D,
- said coating consisting of an, insulating refractory material incorporated with a relatively small quantity of a heat resisting binding substance.
- a metal mold for the production of unchilled gray iron castings said mold being lined with a smooth adherent-coating of fire clay, and an inorganic heat resisting binder.
- a metal mold'for the production of ferrous castings said mold being lined with a smooth adherent coating of fire clay, and
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
- Paints Or Removers (AREA)
Description
Patented ma 1, 1923.
UNITED STATES PATENT OFFICE.
DANIEL H. MELOCHE, OF DETROIT, MICHIGAN, ASSIGNOR TO EARL HOLLEY, OF
DETROIT, MICHIGAN.
COATING FOR METAL MOLDS.
No Drawing.
To all whom it may concern:
Be it known that I, DANIEL H. MELOGHE,-
of the mold and in which a superimposedcoating of lamp black is also used.
The difiiculty heretofore found with the coatings used has been that the coatings that were easiest to apply were the least stable and those which were extremely refractory and therefore most desirable would not adhere to the face of the mold. Coatings eas iest to apply were volatile or semi-volatile 2 but because they were volatile they were not permanent.
The ideal coacting available is fire clay, as this most refractory coating prevents the overheating of the molds and acting as an insulator as well as a refractory coating. Overheating is objectionable because it limits the thickness of the lamp black coating that y can be applied and so still further increases the overheating. Various methods have been proposed for makingfire clay adhere as a smooth non-blistering coating.- I have discovered that if finely ground fire clay be mixed with Water glass, which is the trade name of a solution of sodium silicate in water, and if this mixture of fire clay and sodium silicate solution be applied to a heated metal surface the water evaporates and the sodium silicate acts as a binder for the particles of fire clay. This coating is both tenacious and refractory, the silicate giving it its tendency and the fire clay its refractory and insulating properties. I have found that with this coating I can pour iron at a temperature of 2500 F. continuously at atemperature of 2500 F. continuously and repeatedly without overheating the molds providing a thick coating of lamp black is maintained on the coating The coating is Application filed August 11, 1922. Serial No. 581,239.
particularly adapted for use in the production of unchilled iron castings commonly known in the trade as gray iron castings.
Satisfactory results have been obtained by using a 10% saturated solution of sodium silicate in water and mixing an equal weight of finely ground fire clay with the solution. That is to say, I may take 10 pounds of the water solution and add to the same 10 pounds of the finely ground fire clay, which has been found to be an ideal mixture for making certain castings. The quantity of fire clay, however, may be reduced somewhat where the mold having the coating applied thereto is designed for the casting of complicated or intricate castings.
The method of applying this coating is as follows:
The surface of the cast iron or other metal molds being cleaned is first heated to approximately 350 F. and then the solution prepared as described above is applied with a brush, four or five coatings being applied quickly so that a substantial thickness of sodium silicate and fire clay is formed on the surface of the molds.
In actual use the refractory coatin is in its turn protected by a thick coating 0 lamp black renewed between each casting, as described in my co-pending application Serial Number 579,927, filed August 5, 1922.
What I claim is:
1. A coating for protecting iron molds,- consisting of an inert refractory insulating material, and a small percentage of solublesilicate actin as a binder only for the refractory insu ating material.
2. An insulating refractory wash for coating iron molds, consisting of fire clay powder suspended in water, in which there is dissolved a small percentage. of soluble silicate.
3. A coating for a permanent mold to be used in the production of ferrous castings,
consisting of fire clay and a heat resisting adhesive.
4. A coating for protecting iron mold surfaces, consisting of an insulating refractory material mixed with water and a heat resisting binder, said coating being adapted to resist a temperature of at least2000 F.
5. A mold. for metal castings, comprising a cast iron body havin a mold cavity and a refractory lining or the surface of the mold cavity consisting of a mixture of refractory material and a binder of soluble silicate.
6. A metal mold having its mold surface coated when heated with a Wash containing a refractory insulating material mixed with a heat resisting adhesive, and being adapted to resist a temperature of at least 2000 F.
7. A metal mold having its mold surfacecoated when heated with a wash containing a fire clay mixed with a heat resisting adhesive, and being adapted to resist a temperature of at least 2000 F.
8. A mold for castings, con'iprising a mold body having a cavity, an insulating refractory coating for the mold cavity adapted to v resist a minimum temperature of 2000 D,
said coating consisting of an, insulating refractory material incorporated with a relatively small quantity of a heat resisting binding substance. 41
9. A metal mold for the production of unchilled gray iron castings, said mold being lined with a smooth adherent-coating of fire clay, and an inorganic heat resisting binder.
10. A metal mold'for the production of ferrous castings, said mold being lined with a smooth adherent coating of fire clay, and
an inorganic heat resisting binder.
11. .A metal mold for'the production of ferrous castings, said mold being lined with a smooth adherent'coating of fire clay, and a binder of soluble silicate.
In testimony whereof I aflix my signature.
DANIEL H. MELOCHE.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US581239A US1453593A (en) | 1922-08-11 | 1922-08-11 | Coating for metal molds |
| DEM81085D DE463229C (en) | 1922-08-11 | 1923-04-04 | Paint for metal casting molds containing clay and water glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US581239A US1453593A (en) | 1922-08-11 | 1922-08-11 | Coating for metal molds |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1453593A true US1453593A (en) | 1923-05-01 |
Family
ID=24324404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US581239A Expired - Lifetime US1453593A (en) | 1922-08-11 | 1922-08-11 | Coating for metal molds |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US1453593A (en) |
| DE (1) | DE463229C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2558411A (en) * | 1945-05-22 | 1951-06-26 | Battelle Development Corp | Ceramic coating composition, coated article, and method of making same |
| US2749587A (en) * | 1949-02-21 | 1956-06-12 | Walter Macfarlane & Company Lt | Method of producing grey iron castings in preheated refractory coated male and female dies |
| US3096684A (en) * | 1958-11-12 | 1963-07-09 | Owens Illinois Glass Co | Fenestraction structure for control of daylighting |
| US3822736A (en) * | 1970-09-30 | 1974-07-09 | N Alexandrov | Method for manufacturing cooling members for cooling systems of metallurgical furnaces |
| US4927688A (en) * | 1986-12-15 | 1990-05-22 | Eisengiesserei Monforts Gmbh & Co. | Cast-iron element |
-
1922
- 1922-08-11 US US581239A patent/US1453593A/en not_active Expired - Lifetime
-
1923
- 1923-04-04 DE DEM81085D patent/DE463229C/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2558411A (en) * | 1945-05-22 | 1951-06-26 | Battelle Development Corp | Ceramic coating composition, coated article, and method of making same |
| US2749587A (en) * | 1949-02-21 | 1956-06-12 | Walter Macfarlane & Company Lt | Method of producing grey iron castings in preheated refractory coated male and female dies |
| US3096684A (en) * | 1958-11-12 | 1963-07-09 | Owens Illinois Glass Co | Fenestraction structure for control of daylighting |
| US3822736A (en) * | 1970-09-30 | 1974-07-09 | N Alexandrov | Method for manufacturing cooling members for cooling systems of metallurgical furnaces |
| US4927688A (en) * | 1986-12-15 | 1990-05-22 | Eisengiesserei Monforts Gmbh & Co. | Cast-iron element |
Also Published As
| Publication number | Publication date |
|---|---|
| DE463229C (en) | 1928-07-24 |
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