US1558035A - Metal-coating apparatus - Google Patents

Metal-coating apparatus Download PDF

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US1558035A
US1558035A US1558035DA US1558035A US 1558035 A US1558035 A US 1558035A US 1558035D A US1558035D A US 1558035DA US 1558035 A US1558035 A US 1558035A
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metal
coating
bath
dross
cylinders
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  • This invention relates to an improvement in metal coating apparatus and it has for its main object the production of such an apparatus in which there is provided a bath of molten coating-metal, and means acting on said coating-metal to remove dross from its surface at the position where coated material emerges from said bath, in order to keep the coating-metal clean at this position and to eliminatethe necessity for the use of protective oil when coating certain metals, and the fire hazard when oil is so used.
  • Another object of the invention is to simplify the method of coating plate and reduce the cost of the finished product.
  • Fig. l is a plan view of an apparatus constructed in accordance with the invention
  • Figs. 2, 3 and 4 are respectively sectional elevations taken on the lines 2-2, 3 3 and 4.-4 in Fig. 1.
  • means for supporting a bath of molten coating-metal such as lead or tin, or an alloy of lead and tin, or any other metal suitable for protective metal coating purposes and means continuously acting on said coating-metal to remove dross fromits surface at the position where Coated material emerges from said bath, as rapidly as said dross rises.
  • said means is removably associated with the bath so that it may be bodily lifted out when it is desired to let the coating-metal cool in the kettle;
  • said means includes two dross-drawing members partly submerged in the coating-metal on opposite sides of said position, and acting to draw the dross in opposite directions away from said position, and means for actuating said members;
  • said means further includes mechanism for producing separation of the dross at said position, preferably by producing two circulating currents of said coating-metal and merging them into one at said position where they break in two, and in so doing, move any particles of dross which may be at said position away therefrom in opposite directions.
  • a kettle 5 for holding the molten-coating-metal, and this kettle may be heated by means not shown but commonly employed for this purpose in the art.
  • Removably associated with said bath is means continuously acting on the molten coating-metal to remove dross from its surface at the position where coated material emerges from said bath, as rapidly as said dross rises.
  • This means includes two side plates 6 and 7, spaced apart by suitable tie-rods 8.
  • the plate 6 is provided with angle brackets 9-9 normally resting upon the upper edge of one of the walls of the kettle 5.
  • the plate 7 is provided with angle brackets 10-10 normally resting on the top of the opposite wall Vof the kettle 5.
  • the particular apparatus selected to illustrate the invention is designed to be used in coating sheet or plate metal, and a curved guide 11 of well known type is provided for guiding the sheet or plate through the bath of molten coating-metal.
  • This guide is provided with the usual apertures 12 through which the molten metal fio-ws into its interior.
  • At the delivery end of the guide l1 are two feed-rollers 13--13 fast on shafts 14-14 journaled in the plates 6 and 7.
  • Adjacent the plate 7, the ends of the shafts 14 are provided with intermeshing gears 15-15 each in mesh with an idle gear 16, which in turn is in mesh with a pinion 17 fast on a shaft 18 journaled in the plates 6 and 7.
  • the shafts 18-18 Adjacent the plate 6, the shafts 18-18 carry and are driven by intermeshing gears 19-19, one of which drives a pinion 2O on a shaft 21 journaled i n the plates 6 and 7, and the other of whlch 1s driven b a pinion 22 fast on a shaft 23 journale in the plates 6 and 7.
  • the shaft 23 carries a spiral gear 24 driven by a spiral gear 25 on a short vertical shaft 26 which is journaled in bearings 27 and 28 secured to the plate 6.
  • the shaft 26 At its upper end the shaft 26 carries a bevel gear 29 in mesh with and driven by a bevel gear 30 mounted on a short shaft 31 journaled in a bearing 32 secured to one side of the kettle 5 before referred to.
  • the short shaft 31 also carries a sprocket 33 'driven by a chain 34 which also overruns a sprocket 35 mounted on av short shaft 36.
  • the shaft 36 is -rotated by.
  • the shafts 14-14 carrying the feedrollers 13-13 are mounted in depending bars 40-40 and 41-41.
  • the bars 40-40 are articulated at their lower ends at 42.
  • the bars 41-41 are articulated at their lower ends at 43.
  • Loosely passing through the upper ends of the bars 40-40, which rest on the plate 7 is a bolt 44 provided with a spring 45 and nut 46, by means of which the bars ⁇ tO-*40, and consequently one end of the feed-rollers 13-13, are pressed toward each other to grip a plate coming through the guide 11.
  • the bars 41-41 are provided with a bolt 47, spring 48 and nut 49 for causing the other end of the feed-rollers 13-13 to be pressed toward each other.
  • l l 4 For the purpose of drawing the dross away from the position at the surface of the coating-metal where the coated plate or f other material emerges from the bath, the
  • dross-drawing cylinders 50-50 having smooth peripheral surfaces' partly submerged in the coatingmetal on opposite sides of said position and acting to draw the dross in opposite directions, as clearly shown in Fig. 2.
  • These dross-drawing cylinders are rotated in Kopposite directions by the gearing hereinbefore described. They act to draw'the thin film of rising dross from said position to themselves and to carry this dross down into the molten metal at the submerged part of the cylinder surfares and up again to the surface of the bath behind said cylinders, where it accumulates.
  • the film of'dross between the cylinders 50-50 is sothin as to be invisible to the naked eye; in fact, it probably does not exist as a film at all times; but whether the rising dross is sutlicient to form a continuous film or not, it is drawn away from said position by the surface tension set up by the action of the cylinders 5050, to the surfaces of which the molten metal does not stick, the surface tension referred to being created by the friction of the cylinder surface on the molten metal.
  • the shafts 18-18 are provided with cylinders 52-52 having uted peripheral surfaces 53, Wholly submerged in said coating-metal. These cylinders operate on opposite sides of said position and are rotated by the gearing hereinbefore described, but at a lower peripheral speed than that of the cylinders 50.
  • the cylinders 52 produce two circulating currents of the coating-metal, as indicated by the arrows in Fig.

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  • Coating With Molten Metal (AREA)

Description

oct. zo, 1925. 1,558,035
` E. R. MILLRXNG METAL COAT I NG APPARATUS Filed April 2, 1925 2 Sheets-Sheet l ily. 1.
m am
@75W ATTORNEY Oct, 20l 1925.
- E. R. MILLRING METAL COATING APPARATUS Filed April 2, 1925 2 Sheets-Sheet 2 Patented Od. 2,0, 1.925.
UNITED STATES PATENT OFFICE.
EDWTN ROSS MILLRING, 0F ORANGE, NEW JERSEY, ASSIGNOR TO AMERICAN MACHINE & FOUNDRY COMPANY, AA CORPORATION' OF NEW JERSEY.
METAL-COATING- APPARATUS.
Application filed April 2, 1925. Serial' No. 20,220.
To all whom t mayA concern:
Be it known that'I, EDWIN Ross MILL- RING, a citizen of the United States, residing at Orange,'county of Essex, and State of New Jersey, have invented a new and useful Improvement in Metal-Coating Apparatus, of which the following is a speciiication.
This invention relates to an improvement in metal coating apparatus and it has for its main object the production of such an apparatus in which there is provided a bath of molten coating-metal, and means acting on said coating-metal to remove dross from its surface at the position where coated material emerges from said bath, in order to keep the coating-metal clean at this position and to eliminatethe necessity for the use of protective oil when coating certain metals, and the fire hazard when oil is so used. Another object of the invention is to simplify the method of coating plate and reduce the cost of the finished product.
With these and other objects not specifi' cally mentioned in view, the invention consists in certain constructions and combinations which will be-hereinafter fully described and then specifically set forth in the claims hereunto appended.
Tn the accompanying drawings, which form a part of this specification and in which like characters of reference indicate the same or like parts, Fig. l is a plan view of an apparatus constructed in accordance with the invention, and Figs. 2, 3 and 4 are respectively sectional elevations taken on the lines 2-2, 3 3 and 4.-4 in Fig. 1.
In carrying the invention into effect, there is provided means for supporting a bath of molten coating-metal such as lead or tin, or an alloy of lead and tin, or any other metal suitable for protective metal coating purposes, and means continuously acting on said coating-metal to remove dross fromits surface at the position where Coated material emerges from said bath, as rapidly as said dross rises. In the best constructions contemplated, said means is removably associated with the bath so that it may be bodily lifted out when it is desired to let the coating-metal cool in the kettle; said means includes two dross-drawing members partly submerged in the coating-metal on opposite sides of said position, and acting to draw the dross in opposite directions away from said position, and means for actuating said members; said means further includes mechanism for producing separation of the dross at said position, preferably by producing two circulating currents of said coating-metal and merging them into one at said position where they break in two, and in so doing, move any particles of dross which may be at said position away therefrom in opposite directions. The above mentioned devices and means may be widely varied in construction within the scope-of the invention, for the particular apparatus selected to illustrate the invention is but one of many possible concrete embodiments of the same. The invention, therefore, is not to be restricted to the precise details of the structure shown and described.A
l For the purpose of providing a bath of molten coating-metal to be applied to material passed through said bath, there is provided a kettle 5 for holding the molten-coating-metal, and this kettle may be heated by means not shown but commonly employed for this purpose in the art.
Removably associated with said bath is means continuously acting on the molten coating-metal to remove dross from its surface at the position where coated material emerges from said bath, as rapidly as said dross rises. This means includes two side plates 6 and 7, spaced apart by suitable tie-rods 8. The plate 6 is provided with angle brackets 9-9 normally resting upon the upper edge of one of the walls of the kettle 5. Similarly, the plate 7 is provided with angle brackets 10-10 normally resting on the top of the opposite wall Vof the kettle 5. By means of the brackets 9 and 10, the various parts of the mechanism now to be described are removably suspendr ed within the kettle 5.
The particular apparatus selected to illustrate the invention is designed to be used in coating sheet or plate metal, and a curved guide 11 of well known type is provided for guiding the sheet or plate through the bath of molten coating-metal. This guide is provided with the usual apertures 12 through which the molten metal fio-ws into its interior. At the delivery end of the guide l1 are two feed-rollers 13--13 fast on shafts 14-14 journaled in the plates 6 and 7. Adjacent the plate 7, the ends of the shafts 14 are provided with intermeshing gears 15-15 each in mesh with an idle gear 16, which in turn is in mesh with a pinion 17 fast on a shaft 18 journaled in the plates 6 and 7. Adjacent the plate 6, the shafts 18-18 carry and are driven by intermeshing gears 19-19, one of which drives a pinion 2O on a shaft 21 journaled i n the plates 6 and 7, and the other of whlch 1s driven b a pinion 22 fast on a shaft 23 journale in the plates 6 and 7. The shaft 23 carries a spiral gear 24 driven by a spiral gear 25 on a short vertical shaft 26 which is journaled in bearings 27 and 28 secured to the plate 6. At its upper end the shaft 26 carries a bevel gear 29 in mesh with and driven by a bevel gear 30 mounted on a short shaft 31 journaled in a bearing 32 secured to one side of the kettle 5 before referred to. The short shaft 31 also carries a sprocket 33 'driven by a chain 34 which also overruns a sprocket 35 mounted on av short shaft 36. `The shaft 36 is -rotated by.
means of a gear 37 driven by a pinion 38 on the armature shaft of an electric motor indicated at 39. When a sheet to be coated is pushed downwardly through the receiving end of the vguide 11, its leading end is bent by contact with the lower curved wall of the guide and directed to the feed-rollers 13-13 which seize it and pull the plate through the bath, causing it to emerge therefrom at a position above the said feedrollers, as clearly shown by the heavy line P indicating such a plate in Fig. 2.
The shafts 14-14 carrying the feedrollers 13-13 are mounted in depending bars 40-40 and 41-41. The bars 40-40 are articulated at their lower ends at 42. Similarly, the bars 41-41 are articulated at their lower ends at 43. Loosely passing through the upper ends of the bars 40-40, which rest on the plate 7 is a bolt 44 provided with a spring 45 and nut 46, by means of which the bars {tO-*40, and consequently one end of the feed-rollers 13-13, are pressed toward each other to grip a plate coming through the guide 11. Similarly, the bars 41-41 are provided with a bolt 47, spring 48 and nut 49 for causing the other end of the feed-rollers 13-13 to be pressed toward each other. l l 4 For the purpose of drawing the dross away from the position at the surface of the coating-metal where the coated plate or f other material emerges from the bath, the
structure selected to illustrate the invention is provided with two dross-drawing cylinders 50-50, having smooth peripheral surfaces' partly submerged in the coatingmetal on opposite sides of said position and acting to draw the dross in opposite directions, as clearly shown in Fig. 2. These dross-drawing cylinders are rotated in Kopposite directions by the gearing hereinbefore described. They act to draw'the thin film of rising dross from said position to themselves and to carry this dross down into the molten metal at the submerged part of the cylinder surfares and up again to the surface of the bath behind said cylinders, where it accumulates. When the apparatus is in operation, the film of'dross between the cylinders 50-50 is sothin as to be invisible to the naked eye; in fact, it probably does not exist as a film at all times; but whether the rising dross is sutlicient to form a continuous film or not, it is drawn away from said position by the surface tension set up by the action of the cylinders 5050, to the surfaces of which the molten metal does not stick, the surface tension referred to being created by the friction of the cylinder surface on the molten metal. To prevent particles of dross from being carried upv over the tops of the cylinders 50-50 into the cleanpool between them, there are provided two doctors 5151,l supported by lthe plates 6 and 7 and just touching the peripheral surfaces of the cylinders in the usual manner.
In the apparatus selected to illustrate the invention, there is further provided mechanism for producing separation of the dross at the position where coated material emerges from the bath, and this mechanism acts by producing two circulating currents of the coating-metal, merging them into one at' said position, there permitting them to break up again into two currents. With this end in view, the shafts 18-18 are provided with cylinders 52-52 having uted peripheral surfaces 53, Wholly submerged in said coating-metal. These cylinders operate on opposite sides of said position and are rotated by the gearing hereinbefore described, but at a lower peripheral speed than that of the cylinders 50. The cylinders 52 ,produce two circulating currents of the coating-metal, as indicated by the arrows in Fig. 2, the production of these currents being aided by means of fixed baiie plates 54-54 below the cylinders 53. and baffle plates 55-55 adjacent said position. The balie plates 54 are supported by the plates 6 and 7, While the baiiie plates 55 are supported by the bars 40-40 and 41-41. As the two currents are merged into one at said poperfectly clean. But in practice it has been found that absolutely clean metal is insured by the additional use of two circulating currents of said coating-metal merged into one at said position and produced by the cylinders 52-52 and its coacting baflie plates; and that when the surface of the coatingmetal is thus kept absolutely clean, the necessity for the use of protective oil is entirely eliminated, and of course the lire hazard due Mto the use of oil is also eliminated.
What is claimed is: Y
l. The combination with means for supportingA a bath of molten coating-metal, of means continuously removing dross from its surface at the position where coated material emerges from said bath.
2. The combination with means for supporting a bath of molten coating-metal, of means continuously removing dross from its surface at the position where coated material emerges from said bath, said means being removably associated with said bath.
3. The combination with means for supporting a bath of molten coating-metal, of means continuously acting on said coatingmetal to remove dross from its surface at the position where coated material emerges from said bath, said means including two dross-drawing members partly submerged in said coating-metal on opposite sides of said position and acting to draw the dross in opposite directions, and means for actuating said members.
4. The combination with means for supporting a bath of molten coating-metal, of means acting on said coating-metal to remove dross from its surface at the position where coated material emerges from said bath, said means including two dross-drawing cylinders having smooth peripheral surfaces partly submerged in said coating-metal on opposite sides of said position, and means for oppositely rotating said cylinders.
5. The combination with means for supporting a bath of molten coating-metal, of means continuously removing dross from its surface at the position where coated material emerges from said bath, said means including mechanism for producing separation of the dross at said position.
(i. The combination with means for supporting a bath of molten coating-metal, of means continuouslyv acting on said coatingmetal to remove dross from its Surface at the position where coated material emerges from said bath, said means including mechanism for producing two circulating currents of said coating-metal and merging them 4into one at said position.
7. The combination with means for supporting a bath of molten coating-metal, of means continuously acting on said coatingmetal to remove dross from its surface at the position where coated material emerges from said bath, said means including mechanism for producing two circulating currents of. said coating-metal and merging them into one at said position said mechanism including a series ofbaile plates for controlling said currents.
8. The combination with means .for supporting a bath of molten coating-metal, of means continuously acting on said coatingmetal to remove dross from its surface at the position where coated material emerges from said bath, saidmeans including two members wholly submerged in said coating-metal on opposite sides of said position and acting to produce two circulating currents of said coating metal and merging them into one at said position, and means for actuating said members. l
9. The combination with means for supporting a bath of molten coating-metal, of means continuously acting on said coatingmetal to remove dross from its surface at the position -where coated material emerges from said bath, said meansincluding two cylinders having iuted peripheral surfaces wholly submerged in said coating-metal on opposite sides of said position and acting to produce two circulating currents of said coating metaland merging them into one at said position, and means for oppositely rotating said cylinders.
10. The combination with means for supporting a bath of molten coating-metal, of means continuously acting on said coatingmetal to remove dross from its surface at the position where coated material emerges from said bath said means including two dross-drawing members partly submerged in said coating-metal'on opposite sides of said position, means for actuating said members, two members wholly submerged in said coating-metal and acting to produce two circulating currents 'of said coating.- metal and merging theminto one at said position, and means for actuating said submerged members.
11. The combination with means for supporting a bath of molten coating-metal, of means acting onsaid coating-metal to remove dross from its surface at the position where coated material emerges from said bath, said means including two dross-drawing members partly submerged in said coating-metal on opposite sides of said position, means for actuating said members, two members wholly submerged in said coatingmetal and acting to produce two circulating currents of said coat-ing metal and merging them into one at said position, means for actuating said submerged members, and a series of baiie plates coacting with said submerged members to control said currents.
12. The combination with means for supporting a bath of molten coating-metal, of means acting on said coating-metal to remeans for oppositely rotating said cylinders,
two cylinders having luted peripheral suracesQwholly submerged in said coatingmetal on opposite sides of said position and acting to produce two circulating currents of said coating-metal' and merging, them into one at said position, and means for oppositely rotating ,said submerged c linders, the eripheral speedfof'said dross-drawing cylinders beingv greater than that of said submerged cyhn ers. a
13. The4 combination with means for supporting a bath of molten coating-metal, of
means continuously removing dross from its surface at the position where coated material emerges from said bath, and means for guilding material to be coated through said 14. The combination with means for supporting a bath of-molten coating-metal, .of means continuously removing dross from its surface at the position where coated material emerges from said bath, and means for guiding material to be coated through said bath including a curved guideway in said bath,
and a pair of feed rollers at the end of said guideway.
In testimony whereof, I have signed my name to this specification.
EDWIN ROSS MILLRING.
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3203395A (en) * 1963-06-14 1965-08-31 Addressograph Multigraph Apparatus for developing electrostatic images
US3323488A (en) * 1962-12-21 1967-06-06 Nat Res Corp Vapor coating apparatus employing crucible scraping means
US3642523A (en) * 1967-04-26 1972-02-15 Siemens Ag Method and device for producing tin layers of {22 3{82 {0 on copper and copper alloy wire by hot tin plating
US3875900A (en) * 1972-09-14 1975-04-08 Gte Sylvania Inc Apparatus and method for coating metallic strips
US4634609A (en) * 1985-06-18 1987-01-06 Hussey Copper, Ltd. Process and apparatus for coating

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3323488A (en) * 1962-12-21 1967-06-06 Nat Res Corp Vapor coating apparatus employing crucible scraping means
US3203395A (en) * 1963-06-14 1965-08-31 Addressograph Multigraph Apparatus for developing electrostatic images
US3642523A (en) * 1967-04-26 1972-02-15 Siemens Ag Method and device for producing tin layers of {22 3{82 {0 on copper and copper alloy wire by hot tin plating
US3875900A (en) * 1972-09-14 1975-04-08 Gte Sylvania Inc Apparatus and method for coating metallic strips
US4634609A (en) * 1985-06-18 1987-01-06 Hussey Copper, Ltd. Process and apparatus for coating

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