US1012048A - Process of coating metal articles. - Google Patents

Description

U. S. ARMSLRON'G PROCESS 0F CCATINC METAL ARTICLES.

APPLICATION FILED FEB. 23, 1911.

1,012,048. Patented Dee. 19, :1911;

` 2 SHEETS-SHEET l. E l E .l i

In ven for s Mmm-wwf SU. s. ARMSTRONG.-

PROCESS OF GOATING METAL ARTICLES.

. APILIGATION FILED FEB. Z, 1911. 1,012,048. o Patent-,ed Deo. 19, 1911.

2 SHEBTS-SHEBT 2.

UNITED `sTAifSiis PATENT onirica. y

ULYSSES S. ABVHSATRONG, OF NEW KENSINGTQN, PENNSYLVANIA.

FRCESS 0F CfOA'lINCi METALl ARTICLES.

To all 'whom it may concern.

Be it known that I, Umrssiis S. ARM- STRONG, a resident of New Kensinton, in the county of Westmoreland and. tate of Pennsylvania, ful Improvement in Processes of Coating Met-al Articles; and I do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to the coating of metal articles, and has special reference to the coating of the interior and exterior surfaces of pipes or tubes.

The object of my invention is to provide a cheap, simple and efficient process for thev coating of metal articles, such as ipes or tubes, which will enable such artic es to be coated on their inner and outer surfaces ina rapid and easy manner with a metallic coating, such as lead and tin, or zinc, as well as enabling such a coating to be formed on such articles evenly and uniformly and without any waste of the material composing such coating.

To these ends my invention consists,'gen erally stated, in the novel process employed in myimproved coating of metal articles, as hereinafter more specifically set forth and described and particularly pointed out in the claims.

To enable others skilled in the art to which my invention appertains to practice the process emplo ed in my improved coat.-

ing of metal articles, vI will describe thesame more fully, referring `to the accomf panying drawing, in'which Figure 1 is a top plan view of an apparatus employed in my im roved process of coat-ing metal articles. ig. 2 is an end view of the same. of the same on the line 3-3 Fig. 1. Fig. 4 is a longitudinal section of the same on the line 4 4, Fig. 1, lookin in the direction of the arrow. Figs. 5 an 6 are'views of the swabbin devices em loyed. Fig. 7 shows another orm of the evice. Fig. 8 is a diagrammat-ic plan view of the complete process employed.

Like symbols of reference herein indicate like parts in each of the figures of the drawing.

As illustrated in the drawing, 1 represente the tank, which' is provided with the usual heating furnace 1" underthe same for heating-the materials within such tank for the coating of the articles to the desired dehave invented a'new and use` Fig. 3 is a crosssect-ion Specification o! Letters Patent. -lPateni-,ed Dec. 19, 1911.- Appiicaaon med rebruaryzs, 1911. semi m. 610,361

gree, and such tank is provided withthe lower or base portion2`andv the upper portion 3 extending up from and at one side of said lower portion. Within the lower portion 2 of the tank 1 and extending longitudinally ofthe same and centrally thereof is a wall 4, which extends down from the top of the upper portion Sand into said portion 2 for a suitable distance' and divides such portion 2 into the compartments -5 and 6, aswell as forming the inner side wall of the upper portion 3 located above the compartment 5: The wall 4 is provided with the pro]ecting portions-7 and S at each end of t-he same, whichy extend from each side of said wall, andare adapted to form pockets` 9 and 10 in said wall and on each side of the. same for the purpose hereinafter described. Within the 'tank 1 are the two shafts 11 and 12, one of which is laced on each side of such tank and prefere ly on an incline in parallel lines with each other.

These shafts 11 and 12 are power driven in any suit-able manner and are adapted to be rotated or revolved in the same and in the roper direction, as shown by the arrows in 1g. 3. The shaft 11 is provided with a wheel 13 having radial arms 14 thereon at each end of the same, and the shaft 121s provided with a similar wheel 15 having similar arms 16 thereon at each end of the same. These wheels 13 and 15 are also a1'- ranged so that the ends of their respective arms 14 and 1,6 will travel within their respective pockets 9 and 10 in the wall 4 of the tank 1 inthe movement of-said wheels throughl said tank by the shafts 11 and 12,

and are also arranged so that such arms on` the end wheels 13 and 15 will overlap and at the same time be'away from each other by their being wall 4. When such arms 14 and 16 on the wheels 13 and 15 are in movement through the tank 1, the lower ends of the same will in the pockets 9 and 1Q -ofthe pass along and be adjacent tothe curved.

guides or bottomsl'? and 18 in the con'ijpart-1 ments 5 and 6 respectively of said tank, and such bottoms are connected together at their inner ends by the vcentral raised portion 19 between Vthe saaie. y

The use and 'operation of my. improved,

process of coating metal articles is as follows: The pipes or tubes. a `are cleanediin the usual manner by the pickling process in the tank A until the scale ,silicates and oxide are loosened or removed from the surfaces oft i water to prevent oxidation.

4of sulfuric or hydroiiuoric acid, after which the pipes are then removed from the repickle and placed in a tank D of running The pipes are then taken from the tank of running water and while wet are each passed through a scrubbing machine- E, vwhich brushes the outside surface'of Athe pipe, and such pipes' are kept wet with cold Water While passlng throu h such machine. They are then passe down the inclined table F having rolls F upon the same and pi es F2 to spray the same with cold Water, an are de osited in a 'storage tank G while wet, an such tank contains water and is located beside the coating machine 1, so that the pipe passes thus from the repickling tank through the ruunin water tank and through the scrubbing mac ine to the storage tank Vwhile in a wet condition. lThe pipe is then taken from the storage tank and immediately dropped into thevflux of the tank, as hereinafter described, ywhile still in a wet condition, or the pipe m-ay be fed, automatically direct from the scrubbing machine to` the coating machine by passing through water to prevent it from becoming dry and thus oxidlze.

The compartments 5 and 6 ofthe portion I' 2 in the tank 1 are filled with thecoating compound such as lead and tin, or zinc, which forms the coating bath b, and reaches the level of thewall 4, or slightly above the same, while the flux bath c of the usual material or compound for preparing the pipes or tubes a for theycoating compound in the bath b is placed inthe upper portion y3 of lthe tank and rests upon that part of the material of the coating bath b that is within the compartment 5, of said tank. The tank 1 being thus ready for the coating operation, the pipes a: as so cleaned and wet from their immersion in cold water are each placed between two of the alined arms 14 on the wheels 13, as said Wheels are revolved by the shaft 11, and such pi es are thus passed down throu h the flux' ath in the portion 3 ofthe sai tank, and then theyare passed ,by said wheels into the coating bath in the compartment 5 of the lower portion 2 of said tank. When each of the pi es a carried byv the arms 14 on the Whee s 13 reach the raised portion 19 on the guides or bottoms 17 and 18 of the tank 1 they passy over said raised portion and are each caught by and between two of the alined arms 16 on the wheels 15, which Wheels are being revolved in the same direction as the wheels 13,

so that such arms Will act to carry said the `flux bath C and coating bath b and are ejected from the tank 1, any surplus material from said bath b isdrained from said pipes back into said bath and between the point Where the pipe leaves the coating bath and the point Where it assumes a horizontal position just before taking its place on the `table 20, by reason of one lend of such pipes being slightly elevated on account of the Wheels 13 and 15 at one end of the tank 1 being so elevated and the coating compound entering said pipes in their passing from the bath c into the bath b being heavier than the luX will hold said flux at its level, so that it is kept in the flux bath c and does not thereby mix with said coating. When t-he pipes a are thrown out of the tank l after being so coated in the bath b and onto the asbestos coated table 20, each of the same can then be caught by any suitable means or mechanism and passed on to a suitable swabbinv device 21, which is Icomposed of a resilient collar or piston 22 Vof asbestos or other suitable materialsupported on a rod 23 and engaging with the interior of such pipe, while a d1e 24 on a.

base 25 and having a movable cover 26 over the same and provided with similar material 27 is adapted to engage with the eX- terior of such pipe to recover any further surplusage of the coating material upon such surfaces of. said pipe, and tofurther coat any places on said pipe which maynot have taken the molten coating while passing through said tank.

It will be obvious vthat the pipes are not allowed to become dry after being immersed in the cold water to wet thesameand before they are placed in the usual muriatic acid and zinc solution, known as theflux, in

order vto avoid' oxidation on such pifpes taking .place either in the air or in such ux before reaching the molten metal for coating the same.

It will be evident that the swabbing operation on `both the interior and exterlor surfaces of the pi es can be performed at one time las descri ed, or at separate times, and by a continuous operation, as desired, while other articles than plpes 1,5', chain 14 vent any Waste of any attention i will l-,oiacasA other means, such as the sprocket and chain devices can be used in conveying the articles. through the tank by a rotary-movement instead 'of the rotatin wheels, as shown in Fig. 7, by sprocket-w eels 13 and and arms 16 on said chain. Various other modiications and changes in theV process employed in'my improved coating of metal articles may be resorted to,

without departing from the spirit of the in-A vention, or sacrificing any of'its advantages.

It will'thus be seen thatin my improved coating of metai'articles, such as pipes, the pipes in striking the coating compound in the first compartment'atthe bottom of the tank will drive the :lux reviously placed on such pipes ahead of t e coatingcompound, which Willpermit such flux to remain above said-compound in its bath, and then such ipes are passed under the partition or wall into the second compartment and are raised. out of the molten mixture or coating com'-- pound `for the swabbing operation, all by mechanical means, thereby enabling the ipid handling and coating of such pipes.

1th one end ohe pipes being slightly elevated in passing through the tank, so as to incline such pipes, the material or ingredientscomposing the flux bath and coating bath to Which such pipes are subjected will alwaysr remain, or go back into their respective baths in the tank and thereby pre-l such material, as Well 'as some of the material-ofthe coating bath removed by the swabbing process can be /saved into`suitable pots or many suitable devices, ,so that such pipe Will receive a uniform and thin coating at the least possible expense. The apparatus shownbeing automatic in its operationwill notV require or handling 'ci the pipes and erform vits work in a clean and Workmanlike manner.

Whatl claim as my invention and desire to secure by Letters Patent is V 1.- The process of vcoating metal articles comprising the steps of cleaning the article, then immersing the article in cold water, then continuously passin the article While wet through a bath of ux and through abath of metallic coatingmaterial, and thenl immediately. removingthe still soft' surplus coating materialfromv-the surfaces of said article.

2. The process of coating metalA articles comprising the steps of cleaning the article, then immersing the article in cold water, then continuously plassin the article? while wet `through a bat oi u bath of metallic coating material, and then immediately removing .the still soft surplus coating materialfrom the surfaces ofsaid 3. The' process" of coating metal articles then immersing theV article in cold Water, then continuously assing wet through abat of flux and through a bath of metallic coating material,',and then immediately removing the still soft surplus coating material article by a resilient swabbing operation.

4. The .process of coating metal articles comprising the ste s of cleaning the. article, then immersing t e -article in cold Water, then continuously passin the 'article while wet through a bath ofux and through a comprising the steps of .cleaning the article,

the article while from the'surfaces of said bath of metallic coating material on an inf eline, and then immediately removing the x and through a still soft surplus coating material from the .surfaces of said article.

5. The process'of coating metal articles comprising the steps of ,cleaning the article,

then immersing the n article in cold Water, then continuously passing the article While Wet through a bath of flux and through va bath of metallic coating material on an ineline, and then immediately removing the still -soft surplus coating material from the surface of said article by a swabbing operation.

6..The process of coating metal articles comprising the steps of cleaning the article, then immersing the article in cold Water, then continuously passin the article While wet through a bathof ux and through a bath of metallic coating materialen an incline, and then removing the surplus coating material from thesurfaces of said article by a resilient swabbing operation.

7. The process of coating metal articles comprising the steps of cleaning the'art'icle, then immersing the article in cold Water, then continuously passing the article by a rotary movement While Wet througha bath of flux and vthrough a bath of metallic coating material, and'then immediately removing the still soft surplus coating material from the surfaces of said article. v

comprising the steps of cleaning the article, then immersing the then continuously rotary movement otflux and through a bath of metallic coating' material, and then immediately `removing the still soft l, surplusl coatin material from the surfaces of-said article ya swabbing o eration.

9. T e process of coating'metal articles comprising the ste thenimmersing t article in cold water, passing the article by a while wet through a bath .115

s of cleaning the article, e article' in cold water,

then continuously passing the article'by a rotary movement Whi e wet through a bath of flux and through 'a bath of metallic coating material, and then removing Y the surplus coating material from the sur aces o f said varticle by al resilient swabbing operation.

A:10.Thc prceess of coatinglmetal articles iso comprising the steps of cleaning the article, then immersing the article in cold Water, then continuously passing the article by a rotary movement While wet through a bath of flux and through a bath of metallic coating material on 'an incline, and then immediately removing the still soft surplus coating material from the surfaces of said article.

11. The process of coating metal articles comprising the steps of cleaning the article, then immersing the'article in cold Water, then continuously passing the article by a rotary movement While Wet through a bath of flux and through a bath of metallic coating material on an incline, and then immediately removing the still soft surplus coating material from the surfaces of said article by a swabbing operation.

12. The process of coating metal articles comprising the steps of cleaning the article, then immersing the article in cold Wat/er, then continuously passing the article by a rotary movement While Wet through a bath of flux and through a bath of metallic coating material on an incline, and then immediately removing the still soft surplus coating material from the surfaces of said article by a resilient sWabbing operation.

13. The process of coating metal pipes comprising the steps of cleaning the article, then immersing the article in cold Water, then continuously passing the pipe While Wet through a bath of flux and through a bath of metallic coating material, and then immediately removing the still soft surplus coating material from the exterior and interior surfaces of said pipe. y

14. The process of coating metal p-ipes comprising the steps of cleaning the article, then immersing the article in cold water, then continuously passing the pipe while wet through a bath of flux and through a bath of metallic coating material, and then' immediately removing the still soft surplus coating material from the exterior and interior surfaces of said pipe by a swabbing operat-ion.

15. The process of coating metal pipes comprising the steps of cleaning the article, then -immersing the article in cold Water, then continuously passing the pipe while wet through a bath of flux and through a bath of metallic coating material, and then immediately removing the still soft surplus coating material from the exterior and interior surfaces of said pipe by a resilient swabbing operation.

16. 'The process of coating metal pipes comprising the steps of cleaning the article, then immersing `the article incold Water,

- then continuously passing the pipe while wet through a bath of flux and through a bat-h of metallic coating material on an ineline, and then immediately removing the still soft surplus coating material from the exterior and interior surfaces of said pipe.

17. Ilthe process of coating metal pipes comprising the steps of cleaning the article, then immersing the article in cold Water, then continuously passing the pipe While Wet through a bath of flux and through a bat-h of metallic coating material on an inoline, and then immediately removing the still soft surplus coating material from the exterior and interior surfaces of said pipe by a swabbing operation.

18. The process of coating metal pipes comprising the steps of cleaning the article, then immersing the article in cold Water, then continuously passing the pipe While Wet through a bath of iux and through a bath of metallic coating material on an incline, and then immediately removing the stillsoft surplus coating material from the exterior and interior surfaces of said pipe by a resilient swabbing operation.

19. The process of coating metal pipes comprising the steps of cleaning the article,

then immersing the article in cold Water, then continuously passing the pipe by a' rotary movement While Wet through a bath of flux and through a bath of metallic coating material, and then immediately removing the still soft surplus coating material from the exterior and interior surfaces of said pipe.

20. The process of coating metal pipes comprising the steps of cleaning the article, then immersing the article in cold Water,

then'continuously passing the pipe by a ro-y tary movement While wet through a bath of flux and through a bath of metallic coating material, and then immediately removing the still soft surplus coating material from'the exterior and interior surfaces of said pipe by a swabbing operation.4

4`2l. The process of coatingV metal pipes comprising the steps of cleaning the` article, then immersing the article in cold water, then continuously passing the pipe by a rotary movement While wet through a bath of flux and through a bath of metallic coating material, and then immediately removing the still soft surplus coating material from the exterior and interior surfaces of said' pipe by a resilient swabbing operation.

22. The process, of coatin comprising the steps of cleaning the article, then immersing'thearticle in cold water, then continuously passing the pipe by a rotary movement While wet through a bath of flux and through a bathof metallic coating material on an incline, and then immediately removing the still soft surplus coating material from the exterior 'and interior surfaces of said' pipe.

23. The process of coating metal pipes comprising the steps of cleaning the article, then immersing the article in cold water,

met-al pipes Lomme then continuously passing the pipe by a rotary movement While Wet through a bath of flux and through a bath of'metallic coatingl material on an incline, and then immediately removing the still soft surplus coating material jom the exterior and interior sur- :faces of said pipe by a swabbing operation.

2. The processo eoatin metal pipes eompising'the steps of'oleanlng the article, then immersing the article in cold Water, then continuously passing the pipe by a rotary movement While Wet' through a bath of fiux and through a bath of metallic coating material on an incline, and then immediately removing the still soft surplus coating material from the exterior and interior surfaces of said pipe by a resilient swabbing operation..

ln testimony whereof, l, the said-ULYSSES S. ARMSTRONG, have hereunto set my hand. 2o

ULYSSES S. ARMSTRNG. Witnesses:

T. B. HUMPHRIES, O. L. THOMPSON.

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