US2227976A - Means for applying variable coatings to metal sheets - Google Patents
Means for applying variable coatings to metal sheets Download PDFInfo
- Publication number
- US2227976A US2227976A US182511A US18251137A US2227976A US 2227976 A US2227976 A US 2227976A US 182511 A US182511 A US 182511A US 18251137 A US18251137 A US 18251137A US 2227976 A US2227976 A US 2227976A
- Authority
- US
- United States
- Prior art keywords
- coating
- metal
- rolls
- sheet
- metal sheets
- 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 32
- 229910052751 metal Inorganic materials 0.000 title description 24
- 239000002184 metal Substances 0.000 title description 24
- 239000011248 coating agent Substances 0.000 description 30
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 239000011253 protective coating Substances 0.000 description 4
- 238000007373 indentation Methods 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 229910052718 tin Inorganic materials 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910000677 High-carbon steel Inorganic materials 0.000 description 1
- 229910000635 Spelter Inorganic materials 0.000 description 1
- 229910002065 alloy metal Inorganic materials 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 229910000648 terne Inorganic materials 0.000 description 1
- 239000005028 tinplate Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/006—Pattern or selective deposits
Definitions
- This invention relates to means for coating metal sheets with a protective metal coating, and relates more particularly to apparatus whereby one side of a metal sheet will have a thin metal 5 coating while the opposite side of the sheet will have a still thinner metal coating.
- variable coated sheet lies in the ability of the apparatus to produce a metal sheet bearing an extremely li'ght coating of the protective metal on the side or surface not exposed to severe service, as, for instance, the outside of a sheet of tinplate to be made into cans, and a standard, or heavier, coating on the opposite side of the sheet where its ultimate use requires an efficient protective coating.
- the reference numeral Ill designates the frame or housing of a coating machine, which latter is adapted to be removably mounted over and partially submerged 35 in a reservoir or pot (not shown) containing the metallic, coating, as molten tin, spelter, terne, or the like, on which floats the usual layer of oxidation preventive oil, used also for smoothing the coating.
- the rolls l3 and I5 are disposed in pairs, each of 45 the rolls I3 being disposed opposite one of the rolls l5.
- Each of the'rolls I3 is in vertical alignment with the other, and both of the rolls I5 are also vertically aligned.
- the roll arrangement may be of two, four, or six roll 50 design and construction.
- the rolls I5 are made of metal having a low carbon content, as, for instance, .45% to 50% previous preparation a low carbon content.
- the rolls I3 consist'of metal having a high carbon content of, for instance,- from 1.05% and up, and about 50 soleroscopic hardness.
- the rolls l3 have dense, hard and smooth surfacesdevoid of the small pits and pores and capable of taking a very high polish, as is typical of this character of dense grain metal.
- the sheet to be'coated is, after and pickling, passed i0 through the flux box and metal pot where a quantity of the metal coating is deposited on and adheres to all its exposed surfaces.
- the sheet passes through the coating bath, it contacts a guide l6 whereby the course of travel of the 1 sheet is directed upwardly between the series of pairs of rolls I3 and. I5.
- the rolls I3 and I5 function to remove excess quantities of the metal coating and insure a uniform thicknessof such 20 coating.
- the surfaces of the rolls l3 are smooth, hard and dense, and devoid of surface indentations, porosity, and irregularities, the greater portion of the coating on the side of the sheet contacted by said rolls is removed, leaving but an extremely thin film of coating on this surface.
- the minute pits or pores present in the surfaces of the rolls I5 permit more of the coating to adhere to the side or the sheet contacted by the rolls I5 and, as a consequence, this side of the sheet receives a heavier coating than the opposite side, although neither of the surfaces is heavily coated.
- an adjustable brush l8 preferably made of laminated asbestos and metal fabric or soapstone, such brushes functioning to wipe the metal coating from the roll with which it is associated and to maintain said roll free from either undesirable or excess coating metal, scrufi', or objectionable impurities.
- a trough l9 Suspended beneath the topmost roll I5, or, if desired, both rolls I5, is a trough l9 designed to contain a quantity of the coating metal. Obviously, the provision of this trough or troughs, and the additional quantity of the coating metal through which the rolls l5 operate, increases the coating on that side of the sheet contacting the rolls 15.
- the trough is maintained filled with the metallic coating to the proper level by ladling or pumping the same from the tin pot, and the metal in the trough is prevented from oxidizing by reason of being located beneath the oil level.
- rolls l5 have herein been described as being made of high carbon steel. It is also contemplated that these rolls may be made of any of several alloy metals such as chromium,
- one of said rolls of said pair being made of a metal having hard, dense grain characteristics so as to present a surface devoid of surface irregularities, and the other differing metallurgically and being made of a metal having open grain characteristics so as to present a roll having surface indentations.
- apparatus for use in applying a protective coating to metal sheets wherein one side of the sheet is to bear an extremely thin film of said coating and the opposite side of the sheet is to bear a coating heavier than that borne by the first mentioned side of the sheet, said apparatus comprising a frame, a series of rolls journaled' in said frame and disposed in opposing pairs, one of said rolls of each pair being made of a metal low in carbon content so as to afiord a roll surface having minute indentations, and
- the other of said rolls being made of a metal high in carbon content so as to afford a smooth roll surface substantially free of irregularity.
- apparatus for applying different thicknesses of protective metallic coating to the opposite sides of a metal sheet comprising a frame, a series of rolls journaled in the frame and disposed in opposing pairs, one of said rolls of each pair having a surface devoid of surface irregularities and the other roll of said pair having minute irregularities in its surface.
Description
v R. B. McLlN Jan. 7, 1941.
MEANS FOR APPLYING VARIABLE COATINGS TO METAL SHEETS Filed Dec. 30, 1957 INVENTOE /W% ATTORNEY lrp Patented Jan. 7, 1941 PATENT OFFICE MEANS FOR APPLYING VARIABLE COAT- INGS T METAL SHEETS Robert B. McLin, Follansbee, w. Va.
Application December 30, 1937, Serial No. 182,511 4 Claims. (01. 91-592) This invention relates to means for coating metal sheets with a protective metal coating, and relates more particularly to apparatus whereby one side of a metal sheet will have a thin metal 5 coating while the opposite side of the sheet will have a still thinner metal coating.
The economical value of producing such a variable coated sheet lies in the ability of the apparatus to produce a metal sheet bearing an extremely li'ght coating of the protective metal on the side or surface not exposed to severe service, as, for instance, the outside of a sheet of tinplate to be made into cans, and a standard, or heavier, coating on the opposite side of the sheet where its ultimate use requires an efficient protective coating.
I am aware that others have previously attempted to provide a sheet with coatings of vary ing thicknesses on its opposite surfaces, but each has resulted in a heavy coating on one side and a heavier coating on the other, as distinguished from my product wherein one side bears a light standard coating and the opposite side bears a coating lighter than the standard coating. 2 In describing the invention in detail, reference is herein had to the accompanying drawing, in which the figure is a vertical sectional view of a portion of a coating'machine used in connection with the application of the metallic coating to the I 30 sheets.
Referring to said drawing, the reference numeral Ill designates the frame or housing of a coating machine, which latter is adapted to be removably mounted over and partially submerged 35 in a reservoir or pot (not shown) containing the metallic, coating, as molten tin, spelter, terne, or the like, on which floats the usual layer of oxidation preventive oil, used also for smoothing the coating.
40 Journaled in appropriate bearings provided in the housing III are a series of metal rolls I3 and I5, which govern the weight or thickness of the protective coating. As shown in the drawing, the rolls l3 and I5 are disposed in pairs, each of 45 the rolls I3 being disposed opposite one of the rolls l5. Each of the'rolls I3 is in vertical alignment with the other, and both of the rolls I5 are also vertically aligned. Aswill be manifest, the roll arrangement may be of two, four, or six roll 50 design and construction.
The rolls I5 are made of metal having a low carbon content, as, for instance, .45% to 50% previous preparation a low carbon content. On the other hand, the rolls I3 consist'of metal having a high carbon content of, for instance,- from 1.05% and up, and about 50 soleroscopic hardness. As a consequence, the rolls l3 have dense, hard and smooth surfacesdevoid of the small pits and pores and capable of taking a very high polish, as is typical of this character of dense grain metal.
In practice, the sheet to be'coated is, after and pickling, passed i0 through the flux box and metal pot where a quantity of the metal coating is deposited on and adheres to all its exposed surfaces. As the sheet passes through the coating bath, it contacts a guide l6 whereby the course of travel of the 1 sheet is directed upwardly between the series of pairs of rolls I3 and. I5.
The rolls I3 and I5, as they contact the sheets, function to remove excess quantities of the metal coating and insure a uniform thicknessof such 20 coating. Inasmuch asthe surfaces of the rolls l3 are smooth, hard and dense, and devoid of surface indentations, porosity, and irregularities, the greater portion of the coating on the side of the sheet contacted by said rolls is removed, leaving but an extremely thin film of coating on this surface. On the other hand, the minute pits or pores present in the surfaces of the rolls I5 permit more of the coating to adhere to the side or the sheet contacted by the rolls I5 and, as a consequence, this side of the sheet receives a heavier coating than the opposite side, although neither of the surfaces is heavily coated.
Frictionally contacting the underside of one oreach of the rolls I3 throughout the longitudinal extent thereof is an adjustable brush l8, preferably made of laminated asbestos and metal fabric or soapstone, such brushes functioning to wipe the metal coating from the roll with which it is associated and to maintain said roll free from either undesirable or excess coating metal, scrufi', or objectionable impurities.
Suspended beneath the topmost roll I5, or, if desired, both rolls I5, is a trough l9 designed to contain a quantity of the coating metal. Obviously, the provision of this trough or troughs, and the additional quantity of the coating metal through which the rolls l5 operate, increases the coating on that side of the sheet contacting the rolls 15. The trough is maintained filled with the metallic coating to the proper level by ladling or pumping the same from the tin pot, and the metal in the trough is prevented from oxidizing by reason of being located beneath the oil level.
While the rolls l5 have herein been described as being made of high carbon steel. it is also contemplated that these rolls may be made of any of several alloy metals such as chromium,
nickel, tungsten, or any other material affording.
naled in said frame and disposed in opposing pairs, one of said rolls of said pair being made of a metal having hard, dense grain characteristics so as to present a surface devoid of surface irregularities, and the other differing metallurgically and being made of a metal having open grain characteristics so as to present a roll having surface indentations.
2. In apparatus for use in applying a protective coating to metal sheets wherein one side of the sheet is to bear an extremely thin film of said coating and the opposite side of the sheet is to bear a coating heavier than that borne by the first mentioned side of the sheet, said apparatus comprising a frame, a series of rolls journaled' in said frame and disposed in opposing pairs, one of said rolls of each pair being made of a metal low in carbon content so as to afiord a roll surface having minute indentations, and
the other of said rolls being made of a metal high in carbon content so as to afford a smooth roll surface substantially free of irregularity.
3. In apparatus for applying different thicknesses of protective metallic coating to the opposite sides of a metal sheet comprising a frame, a series of rolls journaled in the frame and disposed in opposing pairs, one of said rolls of each pair having a surface devoid of surface irregularities and the other roll of said pair having minute irregularities in its surface.
4. In apparatus for use in applying a protective coating to metal sheets wherein one side of the sheet is to bear a thin film of said coating sent a surface substantially devoid of surface irregularities, and the other roll differing metallurglcally and, being made of a metal having open grain characteristics so as to present a roll having minuteindentations.
ROBERT B. MCLIN.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US182511A US2227976A (en) | 1937-12-30 | 1937-12-30 | Means for applying variable coatings to metal sheets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US182511A US2227976A (en) | 1937-12-30 | 1937-12-30 | Means for applying variable coatings to metal sheets |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2227976A true US2227976A (en) | 1941-01-07 |
Family
ID=22668787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US182511A Expired - Lifetime US2227976A (en) | 1937-12-30 | 1937-12-30 | Means for applying variable coatings to metal sheets |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2227976A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2527744A (en) * | 1946-09-12 | 1950-10-31 | Tennessee Coal Iron And Railro | Tinning machine |
| US2759850A (en) * | 1952-11-24 | 1956-08-21 | Wheeling Steel Corp | Coating sheets with molten metal and apparatus therefor |
| US2978355A (en) * | 1956-11-22 | 1961-04-04 | Busch Andreas | Method and apparatus for coating metals |
| US3083120A (en) * | 1960-06-28 | 1963-03-26 | United States Steel Corp | Method for making differentially coated galvanized steel sheet |
| US3207128A (en) * | 1962-04-27 | 1965-09-21 | Western Electric Co | Apparatus for coating electrical articles |
| DE1207756B (en) * | 1959-12-28 | 1965-12-23 | Armco Steel Corp | Iron sheet and strip galvanized in different thicknesses on both sides and process for its production |
| US3608520A (en) * | 1969-09-12 | 1971-09-28 | Bethlehem Steel Corp | Coating apparatus |
-
1937
- 1937-12-30 US US182511A patent/US2227976A/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2527744A (en) * | 1946-09-12 | 1950-10-31 | Tennessee Coal Iron And Railro | Tinning machine |
| US2759850A (en) * | 1952-11-24 | 1956-08-21 | Wheeling Steel Corp | Coating sheets with molten metal and apparatus therefor |
| US2978355A (en) * | 1956-11-22 | 1961-04-04 | Busch Andreas | Method and apparatus for coating metals |
| DE1207756B (en) * | 1959-12-28 | 1965-12-23 | Armco Steel Corp | Iron sheet and strip galvanized in different thicknesses on both sides and process for its production |
| US3083120A (en) * | 1960-06-28 | 1963-03-26 | United States Steel Corp | Method for making differentially coated galvanized steel sheet |
| US3207128A (en) * | 1962-04-27 | 1965-09-21 | Western Electric Co | Apparatus for coating electrical articles |
| US3608520A (en) * | 1969-09-12 | 1971-09-28 | Bethlehem Steel Corp | Coating apparatus |
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