US2224514A - Melting pot - Google Patents

Description

Dec. 10, 1940. A. H.v JUNG I 2,224,514

MELTING POT Filed Apr'il 28, 1939 llllII'llL'IlIIIIlI/lll,

vllllllallrll. r11/'lh 1,11

yl llllllllll llllllll. 'llll/ 3x1/wenig@ FL-Bem- @EL L) :FEM

Patented D=.1o,194o`l 'I d l.2,224,514

UNIT-ED STATES PATENT-Ormea Albert H. Jung, Flushing, N. Y., assigner to United v American Metals Corporation, Brooklyn, N. Y.;

acorporation of New York Application April 28, 1939, Serial No. 270,633

l'Claim. (Cl. 26S- 33) This invention relates to melting pots and end of thev pour spoutl 23 and the externally ymore particularly toa bottom pouringpot and threaded connector 24 which secures the valve the control of the outlet thereof. body 25 to the assembly. In cooperatingrelation i Prior to Vthe instant invention melting pots with said valve body is the frusto-conical rotary have been provided with bottom pour outlets infvalve element 26 having an opening 21 there- 5 cluding valves in said outlet but such pots and through which is adaptedto register with the their controls have been relatively unsatisfacopenings 28 within thevalve body 25 which in tory for they have been expensive to manufacturn cooperates with the interior of the. conture, easily injured. subject to undesirable leaknector 24 and the passage through the pouring l age and freezing, and their designhas been such spout 23. The pouring spout 23r is pitched at Va 10 as to promote the formation of oxidation or dross slight angle from the horizontal whereby graviwhich is generally objectionable as it wastes tational forces will ensure ythe emptying thereof metal and isunsightly. of molten-metal. The valve 26 being spaced It is an object of the instant vinvention to from the bottom wall 29 of the pot I5, there-will l provide a melting pot having a bottom pour outalways be suillcient hot metal within pot i5 to 15 let and a control therefor which may be readily prevent freezing of the valve. This valve 26 and fabricated of simple and inexpensive elements, the interior of the valve body 25 with which the capable of accurate control, practically incapavalve cooperates need not be accurately machined ble of injury and substantially not subject to but may be simply of a relatively lower standard leakage. usually associated with cast iron valves of this 20A` It is a further object of the invention to protype. The upper portion of the valve 26 may be vide a melting pot, including a bottom pour outformed with a projection 30 of square horizonlet, and a control therefor which generally intal section whereby the operation of the valve hibits the formation of dross on the surface of may be readily effected by an operating rod 3| the discharged molten metal. formed at its lower end with a socket 32 havingl 25 Other objects and the nature and advantages an interior which cooperates with the projecof the invention will be apparentfrom the foltion 30. lowing description taken in conjunction with the The stem 3| need not -be accurate nor is it` accompanying drawing, wherein: necessary that it be formed with screw threads Fig. 1 is a vertical view of a furnace incoras is found on conventional valve stems asso- 30 porating a bottom pour melting pot and a valved ciated with bottom pour melting pots. Rotation control therefor in accordance with the invenof the valve stem 3| may be effected by the relation; tively longhandle 32-which is secured to the Fig. 2 is a fragmentary sectional view illusupper portion of the valve stem 3| by the screw c 35 trating the control for the kettle with the valve 33. The handle 32' may beA of a length which 35 in open position; extends over the upper outer edge of the melting Fig. 3 is a view similar to Fig. 2 with the valve pot I5 and the furnace cap i1 whereby the opercled but illustrating a modified form of pourators hand need never be subject. to the hot ing spout; ambient directly above the melting pot. Figure 4 is a view similar to Figs. 2 and 3 and When the handle 32' is rotated to bring the 40 illustrates a cast iron pot with the means for valve 26 to its open position as illustrated in holding the pouring spout and valve assembly Fig. 2, the molten metal will flow directly through cast integral with the pot. d the valve body 2l, the opening 21 within the valve Referring to the drawing, a furnace i6 com- 26, through the exterior of the connector 24, prising a casingv lined with the refractory maand through the discharged spout 23 with sub- 45 terial i2 having a bottom well. I3 in which a stantially no formation of dross as the hot metal burner i4 is located directly below the bottom of does not fall through an air space as in convena melting pot I5 suspended atditsv upper outer tional bottom pouring melting pots with which margin from the shoulder i6 of the cap I1 which the formation of dross is associated. covers the top edges of the casing ii and th As the function of the stem 3| is simply to 50 refractory lining i2. effect rotation of the socket end 32 which in Formed within a lower portion of the vertical turn causes rotation of the valve 26 Vthe accuracy wall i3 of the melting pot Il is an opening |3 with which the said valve stem is fabricated is to which is welded a nipple 2l having internal relatively unimportant and accordingly the asscrew threads 2| which cooperate with the inner sembly may be made very inexpensively. Though 55 Fal the parts described and illustrated are relatively simple, yet accurate control is effected by the operator by turning the handle 32' an amount to give the required discharge. When the valve 26 is in the position illustrated in Fig. 1 no leakage occurs as the frusto-conical valve 2B eiects a double seal and further the frusta-conical shape tends to prevent leakage when associated with a melting pot as described, despite relative inaccuracy of parts as compared with other valves of the needle or plug type. A guide 34 may be associated with the upper portion of the stem 3| and secured to the upper flange 35 extending from the vertical wall I8 of the melting pot I5.

In order to minimize the'formationof dross, it is essential that the molten metal not fall through an air space and accordingly the upwardly bent spout |23 illustrated in Fig. 3 is as-lsociated with the wall ||8 of the melting pot ||5. The inner end of the spout |23 is associated with `the valve body |25 and is controlled by a rotary frusto-'conical valve |26. As the spout |23 is of such configuration that it does not empty itself, in order to prevent freezing of metal therein, the heating element |50 is located in alignment therewith and keeps the metal therein in a static molten state until the valve |25 is rotated to its open position and additional metal discharged from the pot H5. In the embodiment of the invention illustrated in Fig. 3, as in that illustrated in Figs. 1 and 2, the valve |25 and valve body |25 are always in thermal contact withl hot molten metal andthe freezing thereof is prevented.

It is to be understood that it is within the scope of the invention to cast the pot 2|8, see

Fig. 4, with an enlarged portion E which may be tapped to receive the correspondingly threaded end T of thespout 223, and the connector 224 which serves to hold the valve body 225 in operative relation with the interior of the pot. In this embodiment of the invention the valve assembly may be precisely that illustrated in Figs. 1, 2 and 3 and described above. y*This construction eliminates thev necessity for additional nipples such as utilized in the embodiment illustrated in Fig. 1.

.. Accordingly, itk will vbe understood that the meltingv pots described may be simply and readily incapable of injury by contact with solid objects kwithin the pot such as ingots, inhibits the formation of dross, does not freeze or stick and will not leak. v 4

It will be obvious to those skilled in the art that'variouschanges may be made in this device without departing from the spirit of the invention and therefore the invention is not limited to what is shown in the` drawing and described in the specification but only as indicated in the appended claim.

What is claimed is:

A melting pot having a generally vertical wall and a bottom wall, a generally horizontal pouring spout and a rotary valve having a generally vertical turning axis, said valve controlling communication from4 said pot through said spout,

Vsaid valve having contacting surfaces located

Images