US2315150A - Exit roll for galvanizing pots - Google Patents
Exit roll for galvanizing pots Download PDFInfo
- Publication number
- US2315150A US2315150A US289475A US28947539A US2315150A US 2315150 A US2315150 A US 2315150A US 289475 A US289475 A US 289475A US 28947539 A US28947539 A US 28947539A US 2315150 A US2315150 A US 2315150A
- Authority
- US
- United States
- Prior art keywords
- exit
- rolls
- galvanizing
- roll
- exit roll
- 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
- 238000005246 galvanizing Methods 0.000 title description 14
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002245 particle Substances 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 239000005864 Sulphur Substances 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- 235000019270 ammonium chloride Nutrition 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 238000005282 brightening Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 101100298225 Caenorhabditis elegans pot-2 gene Proteins 0.000 description 1
- 206010012186 Delayed delivery Diseases 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc 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
- the presentinvention relates to exit rolls -for galvanizing pots and the like and more particularly to rolls having a roughened surface.
- An object of the present invention is the provision of exit rolls having a shot blasted or knurled surface to eliminate dirt accumulation on the surface of the rolls and thereby produce cleaner sheets.
- Another object of the present'invention is the provision of roughened exit rolls in a galvanizing pot or the like so as'to produce sheets free from the usual foreign particles and surface imperfecr tions which have, in the past, been the cause of 'the high percentage of rejections in finished galvanized sheets.
- Figure 1 is a longitudinal section of a galvanizing pot embodying the present invention
- Figure 3 is an elevation of an exit Koll having a shot blasted surface
- Figure 4 is a fragmentary View illustrating a means for pressure adjustment of the exit rolls.
- grooved exit rolls generally leave characteristic imprints of the grooves upon 'the sheets which detract from the surface appearance of the finished product.
- the numeral 2 represents a conventional type galvanizing pot having entry rolls 3 of conventional design.
- the material 4 passes through the entry rolls and downwardly into the galvanizing pot between conventional guide construction 5 and guide rolls 6, which are supported, in any conventional manner, by the rigging housing 1, which likewise is* of conventional design.
- c'onventional peg rolls 8 are provided for guiding ported, in any conventional manner therein, are provided exit rolls 9. These exit rolls are provided with a roughened surface, which roughness 'is of sufficient magnitude to permit the liquid metal within the pot 2 to flow to any point on the roll surface so as to present ideal conditions for removal of attached. foreign particles therefrom by free and unhampered rinsing with the molten metal through which the roll is rotating.
- One form of roughened surface is clearly illustrated in Figure 2, which surface is shown as being a knurled surface.
- This knurled surface is provided by a knurling tool of convention'al design, so as to produce a uniform surface roughness, and while a particular design has been shown in the drawing, it is to be understood that other types of knurle'd surfaces may serve the same purpose and produce the same result desired.
- FIG 3 there is shown another form of roughened surface which, in this particular instance, is produced by shot blasting.
- the degree of blasting is determined by the desired uniform roughness of the roll surface.
- exit rolls 9 must be operated as loosely as possible and are mounted in bearings of conventional design; as diagrammatically shown in Figure 4, so that only s'ufficient pressure isexerted upon the exit rolls to move thesheet forward 'into the peg rolls 8,
- an adjustable pressure -device for such purpose 'directed to the top side of the sheet in order to avoid staining.
- a duli surface is developed by subjecting the. freshly coated strip or sheet to'open flames or higher temperatures in conjunction with the use of a muflie after the sheet or stripemer'ges from' the exit rolls in order to destroy .the spangiing and develop a duli, satiny, spangle free finish.
- mufiie In conjunction with the aforemention'ed' dull previouslyimentioned mufiie is employed as an aid in' developing the duli, spangle free surface in connection with the use' of sulphur and sal ammoniac at the roughened exit roll, it becomes advisable to empioy a higher name or 'operate the mume at somewhat higher than ordinary temperature 'in order to counteract the brightening effect of the sal ammoniac and sulphur treatment.
- a galvanizing pot containing molten ga1- vanizing metal the combination with means for ⁇ conveying sheets through said metal, of a pair well as circumferentially of the roll surface to provide a self-rinsing action in contact with the sheet in the moiten metal, said rolls being loosely mounted' so as to only exert sulcient pressure upon the sheets to move the latter therebetween.
Description
Patented Mar. 30, 1943 UNITED STATES PATENT OFFICE EXIT ROLL FOR GALVANIZING POTS Samuel H. Bobrov, Chicago, Ill. Application August lil, &1939,Sral No. ?89,475 Glaim. (01. 9 59.2)
The presentinvention relates to exit rolls -for galvanizing pots and the like and more particularly to rolls having a roughened surface.
An object of the present invention is the provision of exit rolls having a shot blasted or knurled surface to eliminate dirt accumulation on the surface of the rolls and thereby produce cleaner sheets.
Another object of the present'invention is the provision of roughened exit rolls in a galvanizing pot or the like so as'to produce sheets free from the usual foreign particles and surface imperfecr tions which have, in the past, been the cause of 'the high percentage of rejections in finished galvanized sheets.
Other objects and advantages will become apparent as the description proceeds and reference is had to the accompanying drawing in which:
Figure 1 is a longitudinal section of a galvanizing pot embodying the present invention;
Figure 2 is an elevation of an exit roll having a knurled surface;
Figure 3 is an elevation of an exit Koll having a shot blasted surface; and
Figure 4 is a fragmentary View illustrating a means for pressure adjustment of the exit rolls.
Undervold practice, exit rolls were grooved and, in so being, they tended to gather in and became coated with foreign particles during production by the lead and zine method. Grooved rolls con- I tain continuous uninterrupted depressions protected by two unbroken walls which, should undesirable foreign matter become lodged therein,`
would prevent ready removal of the foreign matter and restrict flow of the molten metal, and prevent efficient rinsing.
Furthermore, grooved exit rolls generally leave characteristic imprints of the grooves upon 'the sheets which detract from the surface appearance of the finished product.
However, under the present invention, these difficulties are overcome. g
In the drawing, the numeral 2 represents a conventional type galvanizing pot having entry rolls 3 of conventional design. The material 4 passes through the entry rolls and downwardly into the galvanizing pot between conventional guide construction 5 and guide rolls 6, which are supported, in any conventional manner, by the rigging housing 1, which likewise is* of conventional design. u v
At the exit end of the galvanizing pot, the
c'onventional peg rolls 8 are provided for guiding ported, in any conventional manner therein, are provided exit rolls 9. These exit rolls are provided with a roughened surface, which roughness 'is of sufficient magnitude to permit the liquid metal within the pot 2 to flow to any point on the roll surface so as to present ideal conditions for removal of attached. foreign particles therefrom by free and unhampered rinsing with the molten metal through which the roll is rotating. One form of roughened surface is clearly illustrated in Figure 2, which surface is shown as being a knurled surface. This knurled surface is provided by a knurling tool of convention'al design, so as to produce a uniform surface roughness, and while a particular design has been shown in the drawing, it is to be understood that other types of knurle'd surfaces may serve the same purpose and produce the same result desired.
In Figure 3, there is shown another form of roughened surface which, in this particular instance, is produced by shot blasting. The degree of blasting is determined by the desired uniform roughness of the roll surface.
It has been developed that, by the use of i roughened exit rolls in the galvanizing pot, certain changes have been necessary in the operation of the galvanizing step. The exit rolls 9 must be operated as loosely as possible and are mounted in bearings of conventional design; as diagrammatically shown in Figure 4, so that only s'ufficient pressure isexerted upon the exit rolls to move thesheet forward 'into the peg rolls 8,
an adjustable pressure -device for such purpose 'directed to the top side of the sheet in order to avoid staining. In certain types of galvanizing,
a duli surface is developed by subjecting the. freshly coated strip or sheet to'open flames or higher temperatures in conjunction with the use of a muflie after the sheet or stripemer'ges from' the exit rolls in order to destroy .the spangiing and develop a duli, satiny, spangle free finish. In
such cases only a small amount of sulphur should be ignited to supply a minimum amountof fumes in 'order to avoid unnecesary brightening' of the coating on the strip or sheet. p
In conjunction with the aforemention'ed' dull previouslyimentioned mufiie is employed as an aid in' developing the duli, spangle free surface in connection with the use' of sulphur and sal ammoniac at the roughened exit roll, it becomes advisable to empioy a higher name or 'operate the mume at somewhat higher than ordinary temperature 'in order to counteract the brightening effect of the sal ammoniac and sulphur treatment.
It will become apparent that under the present invention 'of providing roughened exit rolis in the galvanizing pot, there are produced sheets free from the usual inclusions of foreign particles and surface imperfections which have, since the originof the galvanizing processes, been the cause of high rejections, excessive costs'and delayed deliveries. Also, by providing the knurled or shot blasted exit rolis, the surfaces of said rolls remain cleaner during operation and produce cleaner zinc coated products and eliminate the imprints usually made upon the sheet by grooved-exit rolis.
While I have shown and described specific embodiments of the presentinvention. it will be seen that I do not wish to be limited exactly thereto, since various modiflcations may be made "without departing from the s'cope of the invention, as deflned by the following claim.
I claim: 4
In a. galvanizing pot containing molten ga1- vanizing metal, the combination with means for\ conveying sheets through said metal, of a pair well as circumferentially of the roll surface to provide a self-rinsing action in contact with the sheet in the moiten metal, said rolls being loosely mounted' so as to only exert sulcient pressure upon the sheets to move the latter therebetween.
BAMUEL H. BOBROV.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US289475A US2315150A (en) | 1939-08-10 | 1939-08-10 | Exit roll for galvanizing pots |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US289475A US2315150A (en) | 1939-08-10 | 1939-08-10 | Exit roll for galvanizing pots |
Publications (1)
Publication Number | Publication Date |
---|---|
US2315150A true US2315150A (en) | 1943-03-30 |
Family
ID=23111702
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US289475A Expired - Lifetime US2315150A (en) | 1939-08-10 | 1939-08-10 | Exit roll for galvanizing pots |
Country Status (1)
Country | Link |
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US (1) | US2315150A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2577904A (en) * | 1948-02-03 | 1951-12-11 | Armco Steel Corp | Method for hot dip coating of metal strip |
US2823641A (en) * | 1954-02-24 | 1958-02-18 | Wheeling Steel Corp | Apparatus for fluxing and coating metal strip |
US2875096A (en) * | 1955-08-19 | 1959-02-24 | Wheeling Steel Corp | Continuous hot dip galvanizing of metal strip |
US3407933A (en) * | 1966-09-26 | 1968-10-29 | William H. Klein | Method and device for gravity separation of particles |
US4559900A (en) * | 1984-03-01 | 1985-12-24 | F. J. Littell Machine Co. | Device for coating strip material |
-
1939
- 1939-08-10 US US289475A patent/US2315150A/en not_active Expired - Lifetime
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2577904A (en) * | 1948-02-03 | 1951-12-11 | Armco Steel Corp | Method for hot dip coating of metal strip |
US2823641A (en) * | 1954-02-24 | 1958-02-18 | Wheeling Steel Corp | Apparatus for fluxing and coating metal strip |
US2875096A (en) * | 1955-08-19 | 1959-02-24 | Wheeling Steel Corp | Continuous hot dip galvanizing of metal strip |
US3407933A (en) * | 1966-09-26 | 1968-10-29 | William H. Klein | Method and device for gravity separation of particles |
US4559900A (en) * | 1984-03-01 | 1985-12-24 | F. J. Littell Machine Co. | Device for coating strip material |
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