US1455091A - Method and apparatus for casting rolls - Google Patents

Description

Filed Jan. 10, 1921 INVENTOR Patented May 15, i923.

UNITED STATES PATENT E WILLIAM H. NICHOLS, OF WILKINSBURG, PENNSYLVANIA.

A METHOD .AND. APPARATUS FOR CASTING ROLLS.

Application filedJanuary 10, 1921. Serial No. 436,313.

To all whom it ma/y concern: a

Be itknown that 1, WILLIAM H. NICHOLS, a citizen of the United States, and resident of VVilkinsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Methods and Apparatus for CastingRolls; andI do hereby eclare the following to be a full, clear, and exact description thereof.

Myinvention relates to a method of cast- This constant tipping ofthe ladle results-in a waste of metal as the pouring can never be done so accurately as not to allow more or less of the metal to spill or slop. over, and furthermore each mold .must be provided with a pouring gate which is filled up with metal and this metal has to be remelted for further use.

The object of my invention is to provide a method in which a number of economies are effected and to these ends it consists, generally stated, in forming a plurality or group of molds for casting rolls around a common pouring gate so that the metal for a number of rolls is poured into one gate, and the necessity for tipping the ladle for pouring the individual molds is done'away with.

, In the accompanying drawing, illustrating suitable apparatus for carrying out my improved method, in which Fig. 1 is a vertical section on the line 11, Fig. 2; and g 2 is a cross section on the line 2-2 In the drawing the numeral 2 designates the lower box or drag which rests upon the molding floor 3, and this lower box is filled with sand in which a wood pattern is molded which forms the coupling and neck of the roll in the ordinary manner. The lower box 2, as illustrated, has four neck-molds 2*, although it is apparent that any number may be employed. These neck-molds are connected by the passages 4 with the central part of the box, and the sprue runners 5 radiate from the central portion 015 the box to the molds, saidrunners being formed in the sand 6 and enter the molds 7 tangentially, so as to give the proper swirl to the metal in pure iron is carried toward the periphery or face of the mold and the sullage will concentrate in the center.

-Resting on the flanges 8 of'the lower-box 2 and connected thereto by clamps 9 held in place by wedges 10 are the chills 11 of the ordinary type. Resting on the chills 11 are the upper-boxes 12 containing the sand 13 in which themold for the upper roll-neck The customary and coupling is formed. 3 head 14 is provided in whichthe impurities of iron which rise tothe top in casting are collected.

pouring, by which the heavy and Resting on the lower box 2 is thepouring gate 15 at the upper end of which is secured the funnel 16 for convenience in pouring.

When a group or plurality of rolls are formed, in the above manner, the metal is drawn from the cupola or open-hearth turnaceinto the ladle carried by an overhead crane and the ladle is then moved into position for pouring a group of molds and tilted to allow themetal to enter the funnel 16 whence it passes down through the gate through the radial channels 5 into the lower ends of the molds. The metal, as stated, is given a swirl and rises within the mold until the mold is filled, the impurities gathering in the head 14 at the top.

By pouring a plurality of molds at one time the ladle is only tipped once and the pouring of the molds is accomplished in less time, and furthermore the metal does not have an opportunity to cool ofi' where one continuous pour is made so that the molds are all poured with metal of the same temperature and under exactly the same conditions which insures a uniformity of product.

There is furthermore a great reduction in the waste of metal due to the fact that there is less chance of the metal dripping and slopping over, which occurs each time the ladle is tipped in the pouring of single molds, and as there is only one pouring gate there is a reduction in the amount of metal necessary to pour the molds as distinguished from the old method where each mold had its individual pouring gate.

It will be observed that the upper surface of the sand in the drag flask is substantially all covered by the lower flanges of the chills the sand from beinglifted above the run ners 5Wl1ll6 the metal is being poured. What I claimis: I

1. The method of casting chill r0115 that comprises arranging-adjacent to a common pouring gate a plurality of molds each having a separate and independent chill, pouring molten metal into said gate, and directing said metal tange itially into the lower enises. of saidmolds ,2. The method of casting chill rolls that coinprlsesflarrang ng around a common pouring gate a plurality of molds each h avingi'a separate and independent chill, providing runners communicating with said e-115mg gate' and opening tangent ally into said molds, and pouringinto'said gate,fvvithout interruption, enough metal to fill all of said molds; r

5. Apparatus" for castlng chill r ollscom prising a drag 'having a plurality, of neck cavities formed therein, an upright pouring r gate, sp'rue runners extending from said runners extending radially from the lower pouring gate and opening tangentially into said neck cavities, and separate andi in de pendent'chill's mountedupon said drag above said neck cavities.

4. Apparatus 01 casting chill rolls comprising a drag having a plurality of, neck cavities jfformed therein, an u'p'ijight pouring gate disposed centrally upon said drag, sprue end of Said pouring gate aiid' opening tan gen'tl'ally nto saidneckf cavit es, and separate and independent chills mounted upon d rae b Ye aeekiqavit e a H App r t s; a; aring, h l m sw prising a drag box having a plurality of generally circular recesses arranged symmetrically around a' common center and communicating with a central space through straight passages;arilldkbavity molded Withinea ch ofsaid reeesses, an upright pouring gate disposed centrally upon said drag, sprue runners extending from the lower ort ion;

of said pouring ia nd thiiough said a straight passag'esin said dr gflboieigid runners? opening tangentially into said; neck a s; end'csepd eit fend i dep ee i lls.

mount ed upon said drag abQveHsa-id neck cavities. v p

6, Apparatus for a drag box having] 1 recesses arr ange'd symmetrica bi y f ll d 521' common center and communicating ,vvith a tral, 5 space f i ronglg; straight pas v neck cav ty molded tlnn each off said res es, l lp F ghtigQl r llg: ate,d spo dp e tra'lly upon said drag, spn e runn rs extendg r d el frem t e lei P 1 93 9i id P g 13 1 t 'quel ,s i v s m h pe sages in s'aid drag box" said runners? open-j, ingtangentially into said' neclr cavities, andj pe ts a d 1 9Pi nt-- 1i ls im p s vi i ab ve it ffrieqk av tie V In testimony whereof I,"thjsajidWl[1iiLrlmi H. NmHbLs; have hereunto" set hjanch WILLIAM NICHOLS;

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