US1850762A

US1850762A - Apparatus for treating metal coated parts

Info

Publication number: US1850762A
Application number: US440118A
Authority: US
Inventors: David W Martin; John J Whalin
Original assignee: General Electric Co
Current assignee: General Electric Co
Priority date: 1930-03-29
Filing date: 1930-03-29
Publication date: 1932-03-22
Anticipated expiration: 1949-03-22

Description

March 22, 1932. D. w. MARTIN 51" AL 1,850,762

APPARATUS FOR TREATING METAL COATED PARTS Filed March 29, 1930 2 Sheets-Sheet 1 Flgl. l4

Inventor- X/o g John gJ,.\X/halm, g

TheLhAtTovme g.

M rch 22; 1932. D. w. MARTIN ET AL.

APPARATUS FOR TREATING METAL COATED PARTS Filed March 29, 1930 2 Sheets-Sheet 2 Inventor's: David MQMaPt-Ln, John JQWhaILn,

Their Attorney.

Patented I Mar. 22, 1932 DAVID wrm'n-mor nRnxnn-HILL; AND 101m '3': =01 ,tPHILmnLrnm- 2mmsynvenne, ,ASSIGNORS i'roennnnam 'ELnc'rRIo mM PA-NY, {A OORRORATIQN OFNEW arenas-cs ron rnmmmemn'mi. coA'rEnr -ms Application fi1ed'iMarch 29,-1e30.. SeriaL-No. 440,118.;

-The presentrlinvention relates to Lansingproved apparatus :for treating metal Lcoated parts. More specifically, thisz inventionurelates to an apparatus :forvtreating metal coated articles so as to-efi'ect-ively remove vfrom vthe surface thereof any, excess hot metal "which, maybe. present on or adheringthereto.

' Aiprincipal object of this invention is the provision of an apparatus "which vWill ellicien-tly and successfullyremove all the excess coatingmetal from, small metal ,coated castsingsi'whichgare provided with internal or s external-threads; andileaveztheithreaded parts with a smooth, adherent, effective coating'of -pr otectivemetal.

Another object of the present invention is to provide an apparatus which will remove excess metal fromcoatediparts imamimmum ofttime, and :at the :sametime; leaveznone of :the: excess "metal a chilled and in ;.contact with fthe threadedyportionsathereoij l Otherlandyfunther,ohjects'of thisinvention V will 'be moreapparent as 1thevdes'eription' proceedsl' I 'Machines heretoi'ore employed :to aI'QIIIQVB 1 s excess coatedimetal are generallyimore-or less complicated in ;.:mechanical structure; and 'considerabledifficulty has experienced in providing :a practical apparatus for isuc-f cessf-u'lly :nmovings'all the excess ihot metal frem coated metallic parts, especially threads 'ed'hardwvare'such as 'nuts,-bolts and .athe like.

present known machines :often. do not completely remoye theexcess metal and. re- V quentlyle'ave the threac'ledportions -non-uniformly coated so that in many cases they cannot be used withoutzjmetapping. This means added labor and *timefand' hence in ere as'ed, cost. addition, Y after retapping or Qrethreading, the threaded -p'arts "often" must jagain'hehoated.

f gmceordsncewnh a; ao'mjparaiaea 'isj npla imachinehasbeenjd apparatus, "willflefi'ectiyelyiand speedily, re-

moiie gallfexcesssgmetal [from coated 1 eP3Bt lin f lf fi efi i fi,P i9+ rjtectiyeimetal-Qlf the partsiareMthreaiiedQIaII' excess, mejtal. isi remoued e fromv-the threa ed he presentj inyention a 'sed, which machine or vinclined wibrating or shaking screen 'mechtsfgfe d omp c The'shakin g screenimechani'sm s13 gmayrbe s constructed of any. suitable material suchlas A 7 sheet steel and 'comprises a.sulostantially,en-

port on leaving them; smooth 51 g m and unil npair'edv for use.

appli oniIn said dr wi i s Fig.1 represents aside eleyationaljyiew,

:pa t yin section and partly brok y of s the apparatus constructed in accordance with .110 the present invention; V I s 1 i Fig. 2 isfa'planvievaOfthe apparatus shown 1n F g. ,1 certainpartsiheingsbrokenaway;'

Flg.'-'l3 1s a iront elex/ational View of "t apparatus shown in "Fig, ,1, (certain parts ep c" thereof being: broken away for the sake of clearness Riga-41 also affront eleyational view of ,theaapparatus shown in- 1 with certain parts broken away to disclose the sprays -;sor nozzles;

1 Fig. 5 is a fragmentary viewypartly in elevation and partly in section showing ,in detail the reciprocating.mechanism forthe I shaking-screen mechanism, v I Referring ,more particularly to s, Fig. y 1, it

Will b8 seen 'thatthemachin'e is provided with a steel frame-Work designated generally at 10; Afniotor llfisused todriue,all the :moving parts of the apparatus. appa-v so ratus proper comprises areGeivi-nghopper 12 3 suitably "fastened to the .framework 10 and delivering into the top upper portion of an anism designated ,generallyat :13, The hopper 12. contains aninclined screen l4 whi h is-removziblyAfixedtoan upper pontion'tharfi- V of=bymeans of pin '15. Tliis screen lt islfor I the purposeo f receiving the coated par tsas :ithey 'are' deliveredjto :the;hopp,er {and is from =99 time to" time takenlout and the excess metal yfromthecoated partswhichi deposits thereon 7 removed; :Such excess metal may be conyeniently removedfrcm the'sereen by burning it off. 1 7 r l s r epau q ex 'lfin ex d d w t ia opening ;,l7 at cone: ,endfflthereof connectin g Q99 framework 10 and directlybeneath the screen ingrod 29,

trically connected to the shaft 30. The shaft with or delivering into another hopper 18. The screen mechanism also has an opening 19 connecting with the hopper 12. A cover or lid 20 is hinged at the upper part of the box 16. This cover is normally in closed position when'the machine is operating but may be opened to permit the interior thereof to be inspected, or for the purpose of removingor- 44. A deflecting element 45 is suitably mounted within the container 38 to deflect the cleaning the screen 21- within the box 16. i gate or valve 22 ishinged within thebox 14 adjacent the opening leading from the'hopr 12, for the purpose of controlling, the ow of the coated metallic parts from" the hopper 12 onto the vibratingscreen. V

Within the box 16 is suitably fixed, as by welding, the screen proper 21, which is spaced from the bottom of the box 16 so as to permit the excess metal removed from the coated arts to fall to the bottom. The extreme ower end of the bottom of the receptacle or box 16xis cut away for a distance as shown clearly in Fig. 2 of-the drawings, at 23, to permit the excess metal which drops through the screen to flow into a gutter 24 fixed to the box 16 and which carries the metal away to one side of the machine as clearly shown in Fi'gsr2 and 4, and prevents it from flowing into the coolingbath 25. 1

The box 16 is mounted for reciprocatory movement in bearings 26 which are inturn suitably fixed to the adjacent portions of the framework 10. The bearings 26'have associatedtherewith slide bars 27 fixedto the under side-of the box 16,-which bars 27 are adapted to be reciprocated in the said bearings by mechanism hereinafter described.

The reciprocating mechanism is shown more in detail in Fig. 5 ofthe drawings; A

lug 28 isfixedatone end thereof to theunder side of the box 16. To the'free end of said lug is suitably connected one end ofa connectthe other end of which ,is eccen- 30 is suitably mounted in bearings on the framework 10 and carries thereon a pulley 31 connected by means of belt 32'tonthe motor pulley 33 which is in turn fastened to and adapted to be driven by the motorshaft 34. 'The box 16 carries guide lugs 35 whichslide 'on a fixed shaft 36. Suitable butters 37 made of a-material such for example as rubber or a coils ring are provided to absorb the shocks 0 vibration of the screening mechanism.

' Mounted onthe bottom portion of the mechanismis a coolingbath 25 comprising a suitable container 38 filled with asuitable cooling'fluid, such as water, and connecting at one end thereof with the lower end of the hopper 18. The level of the cooling fluid is kept al- 7 most at the top of the containerBS andis "controlled'by the overflow pipe 39 A belt conveyor designated generally at 40 is mounted on the framework 10 and is inclined and travels through the cooling bath 25 for a sub 'stantial portion of its length. The conveyor metal parts falling through the hopper 18 onto the conveyor 40. The lower roller 42 is suitably journalled at one end thereof in the lower end of a belt tightener 46. This belt tightener is suitably fulcrumed on the frame- ;work at an intermediate point in its length,

as at 47, the endopposite to that at which the roller 42' is journalled being suitably provided with adjustable means 48 to permit the 'belt-ti'ghtener to be adjusted when necessary.

Pipes 49 containing a suitable cooling fluid, such as water, are provided, and terminate in nozzles or sprays 50 within the hopper 18 at points substantially in line with the level of the bottom of the box adjacent the opening17. The purpose of the nozzles or sprays 50 will be more-particularly set forth in the description of the operation of-the apparatus. I o

The operation of the apparatus is as follows:

The metallic articles or parts such as metallic castings, nuts, bolts and the like, having first been coated with a protective metal,

for example, by dipping in a molten metal such a zinc, are delivered to the hop r 12. They fall by gravity through this 0 per onto the screen 21 within the box 16 w ch is rapidly vibrated by means of thereci rocating mechanism described above. e box 16 is closed so as to prevent cold drafts from coming in contact with hot coated parts,

which cold drafts would cause the excess hot metal to solidify in spots and render the coated-articles and especially the threaded portions'thereoflnnfit for use. The motor 11 imparts the necessary power to the mechanismwhich reciprocates the screening mechanism and drives the conveyor. screening mechamsm. 1s vibrated very mg The idly and the coated parts are causedto acted upon on every portion of their surfaces and'm a minimum of time, the screen 21 being'provided with'baflles 51 suitably ispaced along the surface thereof to make sure that the coated parts will be thoroughly acted upon and the excess metal eflectively removed.- This excess metal drops through the screen 21 onto the bottom of the box 16 o and carried away throughthe gutter 24 therein. Passing from the box 16 the coated parts fall" through the hopper :18 onto the conveyor 40 withinthe'cooling bath 25. As the coated parts leave the screen 21 and fall into the hopper 18' they receive a spray of cooling fluid fromrthe nozzles 50. Thisthas been found to be desirable and effective to prevent'the coated parts, which are still relativelyhot, from picking up any of the excess metal which may have escaped the. gutter 24 and have fallen into-the hopper 18 and have adhered ,tothe walls thereof. It is impor: tant that no such excess metal come in contact with the coated parts since the latter s will, while still relatively hot, pick up such metal which will adhereto them, and when the parts fall :into the cooling bath 25 the excess metal so, picked'up will solidify; on theparts-and render them unfit for use, especially ifthe excess metal should adhere to threaded portions of'the coated parts. By

s'prayingthe c'oolingiliquidon the parts at within a cooling bath, means for moving;

said conveyor carr ing said hardware throughsaid cooling ath, and spray means located within said hopper adjacent to'the screening mechanism and ,substantiall in line withthe levelat which the coa "articles leave the said mechanism, said spray means being adapted" to spray a cooling liquid onzthe coated articles as they leave the screening ,mechanism and before they fall into the cooling bath.-

In witness whereof, we :have hereunto' set ourhands this 27 th day'of March, 1930.

- DAVID W. MARTIN.-

J OHN; J WHALIN;

this pointthey are partially cooled and thus: I

sufiiciently chilled so that even if they should subsequently come in contact with any ex-. cess metal which has escaped the gutter '24 18, suchexcess metal will not adhere thereto.

The conveyor; carries the coated parts which fall thereon through the cooling fluid,

where they are cooled and washed, and then 7 up and out of the bath and onto a platform 52 whence they fall into a receptacle (not shown),'lplaced thereunder, or from'which platform they can be removed in any desired manner. Y

'An apparatus constructed as shown, and described will operate successfully i'nremovand found its way-to the walls of the hopper 'ing excess zinc from previously galvanized threaded; hardware such as nuts, bolts and the like. The arrangement is compact and rugged and such that the coated parts are caused to be acted uponin a minimum of 4 timeand 1n a manner nsuring the complete,

hardware comprising a substantially enclosed, inclined, vibrating screeningmecha nism provided with baflle plates,-said screening mechanism being adapted to receiveat I v the upperend thereof said coated hardware, 1

means for rapidly vibrating said screening,

mechanism whereby said hardware is caused. l

,to come in contact with said baflie plates and q toibe acted upon the surfaces thereof 'andtoh have all excess metal rem'ovedf therefrom,

means includinga hopper for delivering the a so treated hardware directly to a conveyor