US1472228A - Removal of excess coating material from coated articles - Google Patents

Description

Oct. 30 1923. 1,472,228

c., L. PEIRCE, JR

REMOVAL OF EXCESS COATING MATERIAL FROM COATED ARTICLES FiledMarch 11. 1920 2 Sheets-Sheet 1 Hill. 8

I 1 o I i o /4 M" E /A 2 1 5 E 1:: 6 E) 9Y J fl [g ib WITNESSES C 3 2 9 1 O 3 d O REMOVAL OF EXCESS COATING MATERIAL FROM COATED ARTICLES 2 Sheets-Sheet 2 Filed Ma rqh FH3.Z.

wrmzssss Patented Get. 30, 11923.

enemies L. PEIRCE, an,

res

c" o a hei hten 1W1? ca is li a o F PITTSBURGH, PENNSYLVANIA, .AlSSIGiNOR O33 ONE-HALF OF PENNSYLVANIA.

REMOVAL 0E EXCESS COATING MATERIAL FROM CDA'IED ARTICLES.

Application filed March 1 1, 1920. Serial No. 365,001.

' tion of a simple, effective and commercial method of removing excess coating material from bulky articles, such as rods, pipes or plates, which have been coated by the application of liquid coating material.

A further object is to produce a simple and eliective' method for removing excess galvanizing material from bulky articles, which have been coated by the hot'galvani'zing process. a

These and other objects, which will be made more apparent throughoutthe further description of the invention, are attained by means of the method herein describedas an embodiment of the invention.

In the drawings accompanying and forming a part hereof, Figure 1 is an end elevation of apparatus which may be employed in carrying out my invention. Figure 2 is a side elevation of the apparatus shown in Figure 1, portions being shown in section and broken away for convenience of illustration.

It is customary in galvanizing articlesby the hot dip galvanizing process to submerge them in a bathof molten galvanizing material. Where the articles are bulky such as plates, rods or pipesrany suitable means may be employed for sosubjecting them to the bath that the entire surface of each article is subjected to the coating actions of thejba'th.

It will be apparent that such articles are subjected to and do take up heat from the bath and that-excess coating material adhering to them remains in a molten condition for an'appreciable time after the article has been subjected to the bath. The period of timeduring which the excess material 're mains in the molten state "dep'ends some in a liquid An object of the invention is the producwhat upon the size of the article, the length of time it is subjected to the molten bath, the temperature of the bath and the atmospheric temperature. This, however, is only incident to my invention, since with my invention, the removal of the excess material is accomplished immediately after the coated articles are withdrawn from the bath, while they are still hot, and while the excess material is still in a molten state. The articles removed from the bath of molten metal may be suspended over the bath of molten metal in such a way that they are capable of swinging freely at-least within certain limits. They are then subjected to a hammerlike blow of sufiicient velocity and force to cause them to swing with a high or projectile like velocity against a stationary or substantially rigid abutment or anvil, so arranged in the path of the articles that it abruptly or instantaneously checks themotion imparted to them by the blow.

In the drawings I have illustrated apparatus which may be employed in carrying out the invention. As ilhlistrated, a receptacle 3 is provided at one edge with a substantially rigid upright 4 forming a support for an abutment or anvil mounted thereon and as shown cxtends'horizontally and is located some distance above the upper edge of the receptacle. A swinging hammer or striker 6 is so located with relation to the abutment that it is capable of being moved at a high velocity into con tact with the articles, such as rods it suspended between the striker and the abutment.

5, which suit-ably i As shown in the drawings, the striker consists of a long cylindrical weight rigidly secured to two pivotally mounted rods 7 to which an'impclling force u'iaybe imparted by any suitable means. In the drawings, one rod 7 is shown provided with an integrally formed power arm 8 which extends substantially at right angles to the rod and is adapted to be actuated by a :lootlevcr 9 through the agency of a link 10 Each of "the rods 7 is shown provided with a coun- 'ter-balancing weight 11 and each is provided with several mounted apertures '12 For the striker, so that the striker-may he moved to different longitudinal positions with re The rods are o3? such lation to the rods.

length that their fulcrum points are located well above the abutment 5, and they areof such length 'with'relation'to the power arm to the ceiling or roof structure of the building in which the receptacle 3 is located. It will be apparent that a single counterweight may replace the two counter-weights ll shown in Figure 2 and that it may be mounted on the shaft 13 independently of the rods. i

By employing a relatively long striker 6 and a relatively long abutment 5,, theroperating'mechanism of the striker. maybe so located with relation to the receptacle that it will not interfere with nor prevent theuse of suitable suspending devices for the articlesacted upon. For example, such articles may be suspended by means of a crane V or merely by means of a pulley 17 and or'cable 18. The cable chain 18.

As shown'in the drawings, I preferably employed .a rack 20 capable of receiving a number of rods A and of suspending them in the desired position. The rack shown consists of two fiat steel bars 21 spaced by means of pipesections 22 and provided with supporting arms 23 which may be engaged by a supporting hook secured to the chain 18 passes over the pulley. 17 and its free end may be secured to any rigid support in the usual manner.

As shown in the drawings, the upright i is provided with several apertures 15 which may be employed in mounting the abutment in different positions along it. 7 provided with an imperforate plate 16 spaced awaysfrom the abutment and adapted to'form a shield for catchingexcess coat- Ting; material removed from articles striking :the'abutment. It may also be so lo cated that the material thus removed will drop intothe receptacle 3. i

r In carrying out my invention, the freshly coated articles are suspended between the mabutment and the striker while hot and vvhile'the coating material is still in a molten state. The striker is then moved against the'article or articles so suspended with suiiicient velocity and with sufiicient force to strike the articles a projectile like blow: of such intensity that the article or articles T j are projected witha high velocityfagainst and intensity, in so It'Ii's also I at a high velocity .t 2., The metho d the abutment. :Under such conditions, the impact to which the articles are subjected rial. Such excess material as remainson the article at the time of impact with the abutment is shed from the article by the force. ofthat impact.

It will be apparent that the'weight and velocity of the striker and its position with must be relation to the suspended articles Suchthat it is capable of abruptly accelerating the articles at the time ofimpact with causes them to shed the excess coating matethem, so that the articlesare caused to swing at a high velocity. must also be so proportioned that it will in stantaneously accomplishthe result above described and will do more than set up vibrations or local displacement of the ar ticles. In carryingoout my invention '1 have found that under certain conditions, the abutment may be dispensed with, since the The force imparted hammer blow of the striker is suificient to:

remove excess materiah The use of the abutment, however, is advantageous in that it insures a thorough removal of the excess -material and,by limiting the swing of the articles struck by the striker, simplifies the procedure after the'excess material has been removed. After the articles have been treated ascabove described, they are removed from their suspended positionin any suitable way.

While I have describedbut one method embodying my invention and while'Ihave illustrated and described but one form of apparatus for carrying out the same, it will be apparent that various changes, additions and modifications may be made both in'the .method andin'the apparatus without departing from the spirit and'scope of themvention assetforth by, the appended claims.

What I claim is: i a

1. The method of removing excess coating material from an article coated with liquid coatingmaterial, which consists in suspending the coated article, so that itis capable.

in striking it a blow of such of swinging, force that the suspendedarticle is projected rigidabutment. V .7 v of removing excess galagainst a substantially vanizing material from" an articlecoated by:

thefhot dip process, which consists in suspending. the galvanized article, and subj ecting it while'hot and-while the excess material is in a molten state, to a projectile like blow "ofsufiicient force and magnitude to q p'rojectthe suspended ,bodyaga'inst an abutment. Y 1 3. An'apparatus ,for removing excess; coating material froman article coated with ia'liquid coating comprising an abutment, a 1 striker securedto alongpivotally. mounted 1 7 rod, means for suspendinga coated article .be weenpt utm ntfa d. the strike! a d m 5 vanizing material from means for swinging the striker against the suspended article with a projectile like velocity.

4a. The method of removing excess galvanizing material from an article coated by the hot dip process, whichconsists in suspending the galvanized article, and subjecting it while hot to a projectile-like blow at a point intermediate its ends and of sufficient force and magnitude to project the body laterally at a velocity approximately equal to the velocity of the blow-striking implement.

5. An apparatus for removing excess galan article coated by the hot dip process, comprising means for suspending the article from one end so that it is free to swing, a striker, of a mass comparable with that of the article, secured to a relatively long, pivotally mounted rod, and means for moving the rod about its pivot point to impel the striker into contact with the article at a projectile-like velocity.

. An apparatus for removing excess galvanizing material from articles coated by comprising means for the hot dip process, suspending the coated article from one end, so that the other end is free, a striker of a mass comparable with the mass of the article, a relatively long pivotally mounted rod on which the striker is mounted, and a pedal actuated motion multiply device for swinging said rod about its pivot point.

In testimony whereof, I have hereunto subscribed my name this 9th day of March, 35

CHARLES L. PEIRCE, JR.

Images