US2244388A - Apparatus for the coating of steel or other metallic sheets with tin or other metals - Google Patents
Apparatus for the coating of steel or other metallic sheets with tin or other metals Download PDFInfo
- Publication number
- US2244388A US2244388A US203590A US20359038A US2244388A US 2244388 A US2244388 A US 2244388A US 203590 A US203590 A US 203590A US 20359038 A US20359038 A US 20359038A US 2244388 A US2244388 A US 2244388A
- Authority
- US
- United States
- Prior art keywords
- rolls
- roll
- bath
- tin
- coating
- 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
- 239000002184 metal Substances 0.000 title description 12
- 229910052751 metal Inorganic materials 0.000 title description 12
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 title description 6
- 239000011248 coating agent Substances 0.000 title description 6
- 238000000576 coating method Methods 0.000 title description 6
- 229910000831 Steel Inorganic materials 0.000 title description 4
- 150000002739 metals Chemical class 0.000 title description 4
- 239000010959 steel Substances 0.000 title description 4
- 239000012768 molten material Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 235000019198 oils Nutrition 0.000 description 2
- 235000019482 Palm oil Nutrition 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000002540 palm oil 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
Definitions
- This invention relates to apparatus for the coating of steel or other metallic sheets with tin or other metals (hereinafter briefly termed tin) of the kind in which the sheets are propelled over fixed guides through a bath of molten tin, known as the tinpot.
- the propulsion has usually been effected by pusher forks, operated by hand or mechanically. These forks occasionally damage the sheets.
- a series of rolls is arranged to convey the sheets through the tinpot, namely, a pair of feeder rolls, a rotatable roll which takes the place of one of the usual fixed guides, and upper and lower rolls between which the sheet is received from the said rotatable roll and by which it is conveyed on its way to the usual pair of rolls at the exit end 'of the tinpot.
- The. said upper and lower rolls may be in either plain or disc rolls, or the bottom roll may be plain and the upper roll a disc roll, thus reducing to a minimum the contact of the upper roll with.a sheet, and the surface of the upper roll which it is necessary to keep clean.
- the upper roll is made larger in diameter than the other rolls in the tinpot, so that its surface projects above the level of the molten metal in the tinpot, on top of which floats a layer of palm oil or other suitable grease which by contact with the exposed surface of the large roll keeps it clean.
- the rolls with their shafts are mounted in the same side frames, so that the frames and rolls can be removed from the tinpot intact, thus facilitating the changing and repair of the rolls. Suitable gearing is provided for the driving of the roll shafts.
- Figure 1 represents a longitudinal vertical section of the tinpot, washpot and greasepot
- Figure 2 is a plan showing the driving gear for the rolls.
- A indicates a tinpot which can be arranged for either external or immersion heating, and in which the dotted line C indicates the level of the molten tin; B indicates the washpot; E, F, and G indicate fixed guides, the steel or other metallic sheet passing over the guides E and G and under the guide F and being taken along by the usual pairs of tinpot rolls H, washpot rolls J, and greasepot rolls K, L, M.
- a pair of feeding rolls P, Q which pass th sheet over a guide roll Rn
- This latter roll performs the function of a curved extension of the fixed guide E which is used in tinpots of the usual construction, and enables such extension to be eliminated, thus reducing resistance to the travel of the sheet.
- the sheet passes between additional intermediate rolls S, T, and thence to the usual rolls H.
- 'Ilhese rolls S, T may be plain or disc rolls, but the arrangement which is considered preferable is that the upper roll S is provided with relatively large discs S (see Figure 2).
- the feeding rolls P, Q may also be provided with discs P Q to reduce the contact area between these rolls and the sheet.
- an apparatus for coating metallic sheets with metal the combination of a bath for containing molten metal, a pair of feed rolls disposed above the level of the molten metal in the bath, a single guide roll disposed in the bath of molten material for passage thereover from between said feed rolls of a sheet to be coated with a minimum of friction, a fixed guide member disposed adjacent the bottom of said bath, a pair of intermediate guide rolls disposed between said fixed guide member and said single guide roll for directing the sheet to be coated from said single guide roll to said fixed guide member, the upper of said pair of intermediate guide rolls comprising spaced disks to minimize surf-ace contact with the sheet to be coated and of larger diameter than the lowermost roll to project above the level of the molten metal in the bath so as to be cleaned by a surface film of oil in said bath, and a pair of discharge rolls disposed adjacent the opposite end of said fixed guide member for conveying and directing the coated metallic sheets from the bath.
- an apparatus for coating metallic sheets with metal the combination of a bath for containing molten metal, a pair of feed rolls disposed above the level of the molten metal in the bath, a single guide roll disposed in the bath of molten material for passag thereover from between said feed rolls of a-sheet to be coated with a minimum offriction, a fixed guide member disposed adjacent the bottom of said bath, a pair of intermediate guide rolls disposed between said fixed guide member and said single guide roll for directing the sheet to be coated from said single guide roll to said fixed guide member, said single guide roll being disposed by a surface film of oil in said bath, a pair 0 discharge rolls disposed adjacent the opposite end of said fixed guide member for conveying and directing the coated metallic sheets from the bath, and removable side frame members in said bath in which'the axes of all of said rolls are journaled to permit their removal and replacement as a unit relative to said bath.
Description
June 3, 1941. D. H. DAVIES APPARATUS FOR THE COATING OF STEEL OR OTHER METALLIC SHEETS WITH TIN OR OTHER METALS Filed April 22. 1938 [/7V/7 for .00/70/0 Hump/2n Da l/z'es 3 m, 9 6.
Artur/2 eys' Patented June 3, 1943 APPARATUS FOR THE COATING OF STEEL OR OTHER METALLIC SHEETS WITH TIN OR OTHER METALS Donald Humphrey Davies, Abercarn, England, as-
S or to Richard Thomas & Company Limited, London, England, a British company Application April Q2, 1938, Serial No. 203,590 In Great Britain April 27, .1937
2 Claims.
This invention relates to apparatus for the coating of steel or other metallic sheets with tin or other metals (hereinafter briefly termed tin) of the kind in which the sheets are propelled over fixed guides through a bath of molten tin, known as the tinpot. The propulsion has usually been effected by pusher forks, operated by hand or mechanically. These forks occasionally damage the sheets.
According to the invention, a series of rolls is arranged to convey the sheets through the tinpot, namely, a pair of feeder rolls, a rotatable roll which takes the place of one of the usual fixed guides, and upper and lower rolls between which the sheet is received from the said rotatable roll and by which it is conveyed on its way to the usual pair of rolls at the exit end 'of the tinpot. The. said upper and lower rolls may be in either plain or disc rolls, or the bottom roll may be plain and the upper roll a disc roll, thus reducing to a minimum the contact of the upper roll with.a sheet, and the surface of the upper roll which it is necessary to keep clean. For the latter purpose, the upper roll is made larger in diameter than the other rolls in the tinpot, so that its surface projects above the level of the molten metal in the tinpot, on top of which floats a layer of palm oil or other suitable grease which by contact with the exposed surface of the large roll keeps it clean. There may be one, two, or more discs per roll. The rolls with their shafts are mounted in the same side frames, so that the frames and rolls can be removed from the tinpot intact, thus facilitating the changing and repair of the rolls. Suitable gearing is provided for the driving of the roll shafts.
In order that the said invention may be clearly understood and readily carried into effect the same will now be further described with reference to the accompanying drawing in which Figure 1 represents a longitudinal vertical section of the tinpot, washpot and greasepot, and Figure 2 is a plan showing the driving gear for the rolls.
A indicates a tinpot which can be arranged for either external or immersion heating, and in which the dotted line C indicates the level of the molten tin; B indicates the washpot; E, F, and G indicate fixed guides, the steel or other metallic sheet passing over the guides E and G and under the guide F and being taken along by the usual pairs of tinpot rolls H, washpot rolls J, and greasepot rolls K, L, M. At the entrance end of the tinpot are provided suitable bearings N for a pair of feeding rolls P, Q, which pass th sheet over a guide roll Rn This latter roll performs the function of a curved extension of the fixed guide E which is used in tinpots of the usual construction, and enables such extension to be eliminated, thus reducing resistance to the travel of the sheet. From the roll R. the sheet passes between additional intermediate rolls S, T, and thence to the usual rolls H. 'Ilhese rolls S, T, may be plain or disc rolls, but the arrangement which is considered preferable is that the upper roll S is provided with relatively large discs S (see Figure 2). The feeding rolls P, Q, may also be provided with discs P Q to reduce the contact area between these rolls and the sheet.
What I claim and desire to secure by Letters Patent of the United States is:
1. In an apparatus for coating metallic sheets with metal, the combination of a bath for containing molten metal, a pair of feed rolls disposed above the level of the molten metal in the bath, a single guide roll disposed in the bath of molten material for passage thereover from between said feed rolls of a sheet to be coated with a minimum of friction, a fixed guide member disposed adjacent the bottom of said bath, a pair of intermediate guide rolls disposed between said fixed guide member and said single guide roll for directing the sheet to be coated from said single guide roll to said fixed guide member, the upper of said pair of intermediate guide rolls comprising spaced disks to minimize surf-ace contact with the sheet to be coated and of larger diameter than the lowermost roll to project above the level of the molten metal in the bath so as to be cleaned by a surface film of oil in said bath, and a pair of discharge rolls disposed adjacent the opposite end of said fixed guide member for conveying and directing the coated metallic sheets from the bath.
2. In an apparatus for coating metallic sheets with metal, the combination of a bath for containing molten metal, a pair of feed rolls disposed above the level of the molten metal in the bath, a single guide roll disposed in the bath of molten material for passag thereover from between said feed rolls of a-sheet to be coated with a minimum offriction, a fixed guide member disposed adjacent the bottom of said bath, a pair of intermediate guide rolls disposed between said fixed guide member and said single guide roll for directing the sheet to be coated from said single guide roll to said fixed guide member, said single guide roll being disposed by a surface film of oil in said bath, a pair 0 discharge rolls disposed adjacent the opposite end of said fixed guide member for conveying and directing the coated metallic sheets from the bath, and removable side frame members in said bath in which'the axes of all of said rolls are journaled to permit their removal and replacement as a unit relative to said bath.
DONALD HUMPHREY DAVIES.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2244388X | 1937-04-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2244388A true US2244388A (en) | 1941-06-03 |
Family
ID=10902115
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US203590A Expired - Lifetime US2244388A (en) | 1937-04-27 | 1938-04-22 | Apparatus for the coating of steel or other metallic sheets with tin or other metals |
Country Status (1)
Country | Link |
---|---|
US (1) | US2244388A (en) |
-
1938
- 1938-04-22 US US203590A patent/US2244388A/en not_active Expired - Lifetime
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