US1139887A - Continuous casting-machine. - Google Patents

Description

- G. MELLEN. y

CONTINUOUS CASTING MACHINE.

APPLICAI'ION FILED NOV- 28, 1914.

Patented May 18, 1915.

2 lsmass--sum 1.

I IIIIIIHIHI IIIIIIIIIUIII I I mm G. NIELLEN.

GNTINUQUS CASTING MACHINE. APPLICATION FILLD. Nov. 2a. 1914,.

Patented my 18, w15.

2 SHEETS-SHEEI 2.

' I I o o I V 45 for u on several actors l. the .eed o? )the in ynecessa CONT il intensa,

.if V- maar wr osea, Naw' maaar; assioma rovoonrirvove GASTING CQBIQTIGN, 0F NEW NEW JERSEY, A COBPOBTIQN 0F 'fl' GUS GASTINGbMOHINE.

Application sled November 2a, 1914. Serial No. 874.400.

a citizen of the United States, residing at Llewellyn Fark, West Orange, in the county -of Essex and State of New Jersey, have invented certain new and useful Improvements in Continuous Casting-Machines, of which the iollovvin is a specification.

My invention re to improvements in method andapparatus for casting rods, bars, or other terms of metal in long or indeterminate lengths, and has for its-object to provide an improved method oi operation, as well as better Ways of. introducing the metal into the casting machine.

By practical experience with continuous caetin machines ofthe .type shown in my co n g application Serial No. 839,045, filed MaI/16,1914, and comprisingseries of coperating movingincld blocks, I have found that successful operation depends or. rate How of the metal into .(2) the uidity .of e metal; and (.3.) .the rate of movement of the -moldblocks-ormingthe mold. By my invention, :the automatically controlled by providing for the maintenance of a uniform liydaaiilic head 'ofmolten metal inthe receptacle from which the :molten metal is delivered. The fluidity of ythe molten :metal is :however dicut to accurately control, vas it isadectedfby variations in temperature, variations in com positionand othencauses. 1t .is therefore -to yprovide for variations inthe speed o the moving mold-block, and this eii'ectA by u as the driving means, a variable speed 4electric motor having means for varying its speed. The .operator lcan thus quicklyv alter the walls of the moldare pro to insure the production of a soli continuoua unbroken -rod or har. i -My invention 4further relates to aumeans reventing cloggingo thev moving mold anisin by fleakage or overdowo metal, said means consisting Y arranged at 'the :pointof :introduction of molten metal into the machine; and fh'er relates Vto the sial :construction or alsl rangement of .thefgconduits ,through which molten metal .is delivered fromthemoltenmetal receptacle into vthe continuons 1 c i i r machine. v

' Other objects and features .ci .invention screws C, C.

furet factor is speed at which thekmoving- .R :(.Fi offashieldor rd uns.

In the drawings-Figure 1 is a vertical section through Athe charging end of the continuous castin machine and the moltenmetal receptac e; Fig. 2 is an end view of ,the continuous casting machine, with the .iste

metal ldelivery devices removed; 3

.OUH 0 enlarged vsectional View of one 'molten metal delivery pipe;. Fig. 4 is a modification 0:@ the'construction shown in Ft; Fig. 5 is a detail view of a' form of d very' conduit; Figs. 6 and are respectively .elevatlon and" plan oi the whole machine. e l Rofern tqFig. 1, the, molten-metal de livery m anism comprises a casing A, .referably of metal and ,having a refractory, ning, mounted on a carriage B, and capable of adlustment thereon hy lmeans of Within the casin Aiea Patented May is, isis.

will -appear from thev l,specification and crucihle D, having .a perforate bottom.

Fitted against the ttom of the crucible is the extension E, within which is mounted a iioat F, havin its uplper portion shaped to engage the wa sof t float F .has an u H, provided Wit the ioat from sinking too far downward. A burner casin K, andra fuel feedgk in the 'crucible D and extension E in a asoeket into whic fits the rounded headr M of .a delivery tube M extending into, themold-cavity of the casting machine. The construction of this machine, illustrated in Figs. -6 and 7, is described in ldetail in my application above referredto. lt comprises an upper endlesschain ofzmold-blocks passing around the 1 sprocket -51 and ar correspendingsprccket mounted in the housing 6)..njd a second endless chain of mold@ locks :passing around sprocket 52 eperforation G. The wardly projecting portion a cross-bar l to prevent having an air inlet n, Serves t0 keer the mail.

'molten condition. Metal is dischargedirom. Y

L.` Lhas at its delive'ryend anda sprocket mounted in housing S. The

mold blocks have .cooperating cavities, -so

that'when ftheftwo series of-.mold-blocks are 1&5

brought 4into sagement, a. continuousmold cavityfiszorma v Fig. g1 is shown enig the receiv end offthemae ,at whic are mounts the sprocket wheels 5a, 2,`xnountcd on shafts Wheels engaging the rollers on the mold bloclrs. Bolted between these guides is a guard or shield 6 having an opening in line with the mold cavity, and in this opening is secured a sleeve or nipple 7, through which passes the delivery tube M, as shown in Fig. 5. This tube M may be made of any suitab e material such as graphite, graphite-Crucible cla alunduin or other refractory material.

gn Fig. d is shown a modied form of delivery tube M2, comprising an inner tube 8 or refractory material, surrounded by a loosely htting outer tube 9 ot steel haw'ng at one end an enlargement l0 having approximately the diameter of the mold cavity' and having at its other end a dange 11 engaging a split collar l2 mounted in the opening in the guard plate 6.

ln Fig. 5, the delivery tube ll/.l is connected to the discharge tube L, by an inter` mediate tube L2 having at one end a socket engaging the head M of the tube M, and at the other end a ball engaging a socket in the end of tube lh. rlhis arrangement has the advantage that the tubes L and lvl' need not be brought into such exact alineinent, as the intermediate tube can adjust itself to v the required position.

ln operation, the delivery tube ll/l or M2 is inserted into the opening in the guard plate 6, this opening and sleeve y7 serving to guide the tube-into the mold cavity.I The molten metal receptacle or casting pot is then moved up, and adjusted until the head M lis in engagement with the tube L, or in case the device shown 'in Fig. 5 is used, the tube L is held in engagement with-the head M and the casting pot 1s moved up until the ball of tube L2 is in engagement with the socket in the end oi discharge pipe L. Molten metal is then poured into the Crucible D and passes through opening G, rising in extension E to a height determined by the oat F, which acts as a valve to close the openin Gr. By proper adjustment or? the size an Weight oil the doet l?, the height of the molten metal in the'entension E is maintained at the desired point. '.lhe motor 56 is then started and the chains of mold-blocks are thus caused to move at a-speed sucient to enable a solid rod to be formed within the mold cavity, and delivered therefrom, at the point Fig. lovver series of moldblochs are separated, the formed rod being supported on the Q, beyond the upper chain.

7, vvhere the upper and ineens? lower chain lvvl'iich entends, as indicated at The proper rate of travel of the mold chains is determined by experience, andthe machine is run, at the start, approximately at this rate. 'lhe valve l] is'opened, thereby admitting molten metal into the mold cavity formed by the moving mold-blocks. As soon as the formed rod or bar appears at the point l@ (Fig. 7) ,where the upper and lower series ci molds separate, theoperator can determine by inspection whether the proper speed is being attained, and can then by adjustment of the controller 57 exactly regulate the speed so, that -a unitormly solid and conoplete rod is thereafter continuously pro-- duced.

1. lln a continuous casting machine prising series of traveling mold sections dtting together to forni' 'a continuous inold, the combination of means 'for delivering the molten metal under a constant hydraulic head, and a variable speed motor .for driv ing the mold sections, the motor having means for controlling its speed.

2. ln a continuous casting machine cone prising series of traveling mold sections tting together to forni a continuous incid,

a shield having an opening in line with the i axis ci the mold cavity'.

3. ln a continuous casting machine coin` prising series of traveling mold sections tit ting together to lorrn a continuous noold, a shield having an opening in line with the anis of the mold cavity and a delivery tube extending through said opening into the mold cavity. el. ln a continuous casting machine coniprising series et traveling mold sections iitting together to torni a contiinious` mold, a shield having an opening in line with the anis of the mold cavity and a delivery tube extending through said opening into the mold cavity and having an enlarged ballshaped head outside said opening.

5.. ln a continuous casting machine coroprising series et traveling mold sections dtting together to form a continuous mold, the combination ci? a delivery tube ent/ending into said mold cavity and having -a hallu shaped head thereon, and a second tube havin@ at one end a sechet to coperatie with said head and at its other end a ball-shaped' head, and molten-metal discharge tube i having a suchet to coperate vvith the head of said second tube.

v6. lin a continuous casting machine corns prising series ot traveling moldsections lit ting together to form a continuous mold, a receptacle for molten metal, means for heeting the receptacle, means'iior deliverin/ the molten metal. trom the receptacle nner e constant hydraulic head, and a variable speed rector -for driving the mold-sections,

lll@

-' prising series of traveling mold-sections fit'A incase? prising series of traveling mold-sections fitting together to'form a continuous mold, a receptacle for molten metal, means for delivering the molten metal from the recap-- tacle under-a constant hydraulic head, and a variable lSpeed -motor for driving -the mold-sections, the motor *havingl means for controllinggthe speed.

8. Ina. continuous casting machine com- Y varying the Spee ting together to form a continuous mold a receptacle for molten metal means for e- 15 livering the molten metal trom the receptacle under a constant hydraulic 5 head,` means for movin the molds, and means for Yat which the molds travel. In testimony whereof I alix 1my signa- 2o ture presence of two witnesses.

GRENVLLE MELLEN. Witnesses: v l

JOHN O. BmnLoW, M. E. lWnox.

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