US894926A

US894926A - Mold for casting chilled rolls.

Info

Publication number: US894926A
Application number: US35685607A
Authority: US
Inventors: Ralph H West
Original assignee: Individual
Current assignee: Individual
Priority date: 1907-02-11
Filing date: 1907-02-11
Publication date: 1908-08-04
Anticipated expiration: 1925-08-04

Description

r R. H, WEST. MOLD FOR CASTING CHILLED ROLLS.

APPLICATION FILED FEB. 11, 1907.

PATENTED AUG. 4, 1908.

4 SHEETS-$113111 1.

No. 894,926. PATENTED AUG. 4, 1908.

R. H. WEST.

MOLD FOR CASTING GHILLED ROLLS.

APPLIOATION FILED FEB. 11, 1907.

4 SHEETS-SHEET 2.

wmvissfsk 1w I 200 0 Y v Arm-894,926; Q PATENTED AUG. 4, 190a. Y -.,.VR. H. WEST.

MOLD FOR CASTING GHILLED ROLLS,

APBLIQATION FILED FEB. 11 1907.

4 SHEETS-SHEET 3.

Al Arron/ms 4. to which it pertains to make and use the RALPH H. WEST, OF CLEVELAND, OHIO.

MOLD FOR CASTING CHILLED ROLLS.

Specification of Letters Patent.

Patented Aug. 4, 1908.

Application filed February 11, 1907. Serial No. 356,856.

- To all whom it may concern:

Be it known that I, RALPH H. WEST, a citizen of the United States of America,

residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Molds for Casting Chilled Rolls; and I hereby declare the followingtobe, a full, clear, and exact description of the invention, such as will enable others skilled in the art same. p

This invention relates to improvements in molds for casting chilled rolls.

The primary object of this invention is to provide a roll-casting mold which is beneficial in the manufacture of a chilled roll for obtaining a casting which has all the requirements essential for the production of a chilled roll in which the chilled peripheral shell or crust of the roll-body is uniform in thickness circumferentially and from end to end of the roll, free from checks or cracks and other imperfections and found to be perfectly round when put in a lathe to be turned.

With this object in view, and to the end of realizing other advantages hereinafter appearing, my invention consists, first, in the provision not only of an upper moldpart or cope which is arranged and adapted to be lowered within the upper end of the central part or chill of the mold, but in the provision of a partition-forming head which forms a support for the loam or molding.

sand forming the surrounding wall or walls and bottom of the roll-necl forming cavity" of the drag and can belowered to accommodate a descent of the casting while the chill and the drag-casing remain stationary and is supported by a body of loose sand or similarly fluent or readily displaceable material which is contained within the said casing between the said head and a perforated bottom with which the said casing is provided under the said loose material, with the perforations in the said bottom arranged to discharge downwardly, and with the passage of the said' loose material through the said bottom controlled by a suitably applied and suitably operated-and normally closed valve so that when the said valve is o ened the said loose material will gravitate tl irough the aforesaidperforations and permit the casting and the aforesaid head and any movable portionof the drag between the said head and the casting to descend,

the upper end of the mold; fourth, to provide an annular chill which is not only composed of superimposed rings, but which is provided internally with downwardly and inwardly sloping seat-forming surfaces arranged at dlfferent elevations respectivel and extending circumferentially of the chil which seat-forming surfaces have such relative arrangement and dimensions to not only adapt them to center and support the roll-body-forming portion of the casting, but to accommodate a gradual increase in the horizontal contraction of the casting toward the up er end of the chill and permit of .to provide means whereby the aforesaid valve may be conveniently operated from paralle ism of the said seat-forming surfaces; fifth, to form the lower end of the chill and the lowermost seat-forming surface of the chill in one solid piece which is integral with the adjacent portionof the dragcasing; sixth, to provide not only a simple 'and efiicient cut-off for interrupting continuity in the runner-gate or passage-way employed in conducting molten metal to the drag-cavity but in supporting the said outofl' as required to render it movable down .wardly with the descent of the aforesaid downwardly movable portion of the drag,

which may hereinafter appear.

In the accompanying drawings, Figure 1 is a side elevation, largely in central vertical section, of a roll-casting mold embodying my invention, and in this figure the mold is shown within a pit. Figs. 2, 3 and 4 are horizontal sections on line 22, line 33 and line 4-4, respectively, Fig. 1, looking downwardly. Fig. 5 is a vertical section on line 55, Fig. 1, looking inwardly. Figs. 6, 7 and 8 are horizontal sections on line 66, line 77 and line 88, respectively, Fig. 1, looking downwardly. Fig. 9 is a vertical section on line 99, Fig. 1, looking in the direction indicated by the arrow. Fig. 10 is a horizontal section on line 10-10, Fig. I,

V and seventh, to attain other advantages 7 ing sand at, which body is surrounded by and looking upwardly. Fig. 11 is a vertical section on line 1111, Fig. 1, looking in the direction indicated by the arrow, except that in Fig. 11 the valve d is shown open whereas in Fig. 1 the valve is shown closed.

My improved roll-casting mold (see Fig. 1) comprises a lower 1noldpart or drag A, a central mold-part or chill B, and an upper moldpart or cope C. The chill B (see Figs. 1, 3 and 4) is stationary, being supported as will hereinafter appear. The chill B is annular and arranged vertically, having a circular roll-body-forming chamber 1) extending from end to end of the chill. The upper moldpart or cope C, (see Figs. 1 and 2) is provided centrally with a chamber 13 which extends vertically through the cope and is arranged centrally of the upper end of and in communication with the chill-chamber l). The cope C depends-into and snugly but slidably fits within the upper end of the chill. The cope C is supported from the chill as required to render the cope capable of being lowered.

.within the chill, as will hereinafter appear.

The drag A (see Figs. 1, 6, 7 and 9) is provided with a cavity a which is arranged centrally of the drag and extends downwardly from the upper end of the drag a suitable distance. The cavity 0. is arranged centrally of the lower end of and in communication with the chill-chamber b. The body of the roll to be produced is cast in the chill B, whereas the necks of the rolls are cast in the drag and cope. The drag-cavitya and the cope-chamber 13 are of course enough smaller diametrically than the chill-chamber b and have the general outline required to form the necks of the roll to be cast.

The surrounding wall or walls of the upper :portion'of the drag-cavity a (see Figs. 1 and 6) are composed of a body. of loam or mold supported from a metal ring a which slidably its internally of and is movable vertically' within the up er portion of a stationary "metal casing E 'Theringa is detachably secured to the upknown as the drag-casing.

per portion of the drag-casing E by endwise shiftable horizontally arranged pins a which are spaced circumferentially of and have bearing in the said casing and extend into the said ring. The pins a are withdrawable endwise from the ring a to detach the ring fromthe drag-casing E and permit the said ring and the body of loam or molding sand borne thereby to descend, as will hereinafter appear, with the body of loam or molding sand A which (see Figs. 1, 7, 8 and 9) forms the surrounding wall or walls of the lower portion and bottom of the cavity a. The

' ody A abuts against the lower. end of the body a, and rests upon and is supported from a head F which slidably fits internally of and is movable vertically within the lower porion of the drag-casing E. The head F is provided at its upper side with an upwardly projecting flange F which extends circumferentially of the body of loam or sand 1 The flange F a'l'iords a bottom bearing to the ring a during the descent of the members F, A, a and a as will hereinafter appear. It will be observed therefore that the superimposed bodies of loam or molding sand a and A constitute a downwardly movable inner portion of the drag; that the said downwardly movable portion of the drag is provided with the drag-cavity, and that the ring a and the head F and its flange F form a casing for the said superimposed bodies and obviously also form members of the downwardly movable portion ol the drag. The flange F" is provided with a laterally and outwardly projecting arm f which is formed preferably by a horizontally arranged pin which extends into and is borne by the said flange and projects from the said flange into and through a vertically arranged slot E formed in the drag-casing E, which slot extends iar enough below the said pin or arm to accommodate the descent or downward travel of the head F.

It will be observed that the arm or projecting member f of the head F projects externally of the drag-easing where it can be readily observed, and obviously a downward movement of the said arm. during the operation of the mold is indicative of the descent of the downwardly movable portion of the drag.

The head F rests upon a body of loose sand or similarly readily displaceable or fluent materialf, which (see Fig. 1) is contained within the casing E and below the head F, and. the head F forms a partition between the body of material f and the lower of the superimposed bodies (1 and A of loam or molding sand.

The drag-casing E has a perforated bottom 0 which is instrumental in supporting the body of loose and fluent material f.

The bottom 0 (see Fig. 1) is provided in its upper side with an upwardly flaring cavity 6 having a flat bottom (5" arranged centrally of the cavity and an upwardly flaring surrounding wall. The bottom (a (see Figs. 1, 10 and 11) is provided centrally with a circular hole 0 extending vertically through the bottom. The bottom a is also provided with several downnurrdly discharging slots or perforations 0" arranged radially of the bottom and spacedequidistantly from and circumferentially of the hole a, and a. rotary valve (1 is arranged. over the cavitybottom e and consists of a circular conical member which covers the said. cavity-bottom and is provided at its under side and centrally with a depending circular lug d which engages and is turnable within the hole 0. The valve (1 is provided with several vertical slots or perforations (1 arranged lever radially of the valve and spaced equidistantly from and circumferentially of the axis of the valve, which perforations are arranged in or out of registry with the perforations e in the bottom e according as the valve is in itsopen or closed position. In Fig.- 1 the valve d is shown in its normal position with its perforations (1 out of registry with the perforations e in'the-bottom e and consequently closed, whereas in Fig. 11 the valve is shown open with its perforations d in registry with the perforations e. The conical form of the valve and the upwardly flaring surrounding wall of the cavity e in the bottom 6 facilitate'the descent of material f to the perforations e in the bottom e when the valve dis actuated. into its open position as required to bring the perforations in the valve into registry with the aforesaid perforations in the said bottom and thereby permit the discharge of the said material downwardly through the said perforations so as to accommodate the descent of the head F and bodies of loam or molding sand at and A to ermit the casting to lower during the cooling of the casting.

The depending lug d of the valve d, (see Figs. 1 and 10) is providedwith a laterally and outwardly projecting lever-forming arm d and the bottom 6 is recessed in its under side, as at e to accommodate the location of the said arm or lever, but the said bottom preferably has a portion 6 thereof extending around and thereby affording bearing to the said lever.

The drag-casing E (see Fig. 1) is provided externally and a suitable distance above'the outer end of the lever d with a laterally and outwardly projecting bracket 16 to whicha lever G is horizontally fulcru rned, as at G. The lever G extends upwardly to the upper end of the mold and a suitable distance above the upper end of the pit P where the said lever can be conveniently operated. The lever Gr (see Figs. 1 and 10) straddles or depends alongside of the outer end-portion of the lever (1 arranged to actuate the said valve-lever as required to turn the valve to the extent necessary to place the perforations (Z in the valve into registry with the perforations e in the bottom e and thereby open the valve.

To (prevent accidental o eration of the loosely through the upper end of the lever into a bracket 1.7 which is suitably supported and projects upwardly from the surrounding wall of the pit P, 18 in the said bracket in the closed position of the valve and thereby locks the lever in the said position of the valve but is withdrawable endwise from the bracket to unlock the lever preparatory to the actuation of-the valve into its open position.

A suitably supported receptacle I (seeof the valve (Z and is consequently,

an endwise shiftab e pin 9 extends,

which pin engages a hole bya Figs. 1 and 11) is arranged under the dragcasing-bottom e in position to receive material discharged downwardly through the erforations 6 The receptacle I is provided with two trunnions I and I arranged horizontally and in line endwise at opposite sides respectively of the receptacle and having bearing in upright arms J of a lever J which is arranged to tilt in a vertical plane and mounted or fulcrumed upon a knife-edge 20 arranged centrally between the ends of the lever, and two knife-

edges

22 and 23 are arranged under opposite ends respectively of the lever J in position to limit the actuation of the lever in opposite directions respectively. The receptacle I is arranged at one side of the fulcrum of the lever J, and a vertically arranged rod J is mounted and arranged to bear downwardly upon the lever J at the outer side of the fulcrum and extends loosely through and has lateral bearing in two vertically spaced brackets 24 which are rigid with the surrounding wall of the pit P. The rod J extends to and above the upper end of the pit and is provided near its upper end and externally with a shoulder or seat J for supporting weights (not shown) employed in welghing the contents of the receptacle I. It will be observed therefore that the weight or measure of the said contents is conveniently indicated at the upper end of the pit.

The drag-cavity a is provided at one side and a suitable distance below theup er end of the cavity (see Figs. 1, 7 and 9) wit 1 an inlet for molten metal, and the mold is poured through the said inlet which is formed by the discharging end of a runner-gate which (see Fig. 1) has an upright portion A and a lower portion A which extends horizontally and laterally from the lower end of the upright portion through the drag-casing E and at its inner discharging end forms the inlet of the cavity a. The lower and laterally extending portion A of the runner-gate has its inner end-portion shown formed in the upper end of the body of loam or molding sand A, and has its outer end-portion surrounded by a casing E which is formed on the drag-casing E and also surrounds the lower end of the upright portion A of the runner-gate, which upr ght portion is surrounded above the casing E by a casing l] which rests upon and is suitably attached to the casing E The lower or'inner end-portion of the copechamber 13, (see Fig. 1) has the outline and the dimensions required to form theinner endportion of a roll-neck between the outer end portion of the said neck and the body of the roll, and the surrounding wall or walls of the said portion of the cope-chamber are formed body of loam or molding sand 14 built up within and surrounded by and supported in any approved manner from a metal casing K which constitutes the lower section of the cope-casing, and the reminder of the cope chamber has the contour and dimensions required to form the wabble-forming outer endportion of the said neckand to form a feeding-head h above the wabble-casting portion of the said chamber, with the surrounding wall or walls of the feeding head and the wabble-casting portion of the cope-chamber built up of a body of loam or molding sand 15 within and surrounded by and supported in any approved manner from a metal casing 7r which constitutes the upper section of the cope-casing. The casing-section k is seated on but removable from the top of the lower section K of the cope-casing. It will be observed therefore that the cope comprises an upper part which consists of the casingsection 7c and body of loam or molding sand 15 and a lower part which consists of the casing-section K and body of loam or molding sand 14.

The upper cope-casing-section 76 (see Figs. 1 and 2) is provided at its lower end and externally with laterally projecting lugs 7c spaced circumferentially of the said copecasing-section. Through each lug 10 extends a screw k which is arrangedwith its head abutting against the upper side of the said lug, which screw has its threaded shank screwedinto the flange K. Obviously therefore the upper cope-casing-section is detachably secured to the lower cope-casing-sec tion, and only the withdrawal of the screws 76 is required to accommodate the separation of the upper cope-part from the lower copeart.

The lower eope-casing-section and consequently the cope are supported from the chill as will hereinafter appear.

The chill B (see Figs. 1, 3 and 4) is composed of superimposed rings arranged in line vertically, and the lowermost ring 25 of the lower portion of the chill is solid and formed integral with the adjacent portion of the drag-casing E, and the remainder of the lower portion of the chill is formed by superimposed sectional rings 26 which are divided vertically into sections, having their joints 37 spaced circumferentially of the chill. Each section of the lower of adjacent rings of the said lower portion of the chill is provided at the top with a rib 28 having beveled sides and arranged circumferentially of the chill, which rib engages a correspondingly shaped recess 30 formed in and extending circumferentially of the bottom of the upper of the said rings. By this construction the sections of the upper of adjacent rings of the lower portion of the chill are held in place upon the lower of the said rings.

The uppermost sectional ring of the lower portion of the chill is reduced in external diameter at its upper end, as at 32, Fig. 1, and the said diametrically reduced upper end of the said ring is embraced by the lower end of the upper portion of the chill, and the said upper portion of the chill (see Figs. 1 and 3) is shown formed by a single ring 38 which is comparatively long and divided into halves or sections, with the adjacent ends of adjacent sections provided with laterally and outwardly projecting flanges 34 and held properly joined together in any approved manner, as, for instance, by tapering pins 35 which engage registering holes 36 formed in the said flanges.

To more effectually and positively hold the upper portion 33 of the chill in place upon the uppermost chill-ring 26 of the lower portion of the chill, wedges Q are arranged externally of the lower end of each section of the aforesaid upper portion 33 of the chill and driven tightly into place between the said section and lugs 39 which are formed on the adjacent section of the said uppermost chillring 26 of the lower portion of the chill and project laterally and upwardly from the said chill-ring a suitable distance. The chillrings are also shown provided externally (see Fig. 1) with recesses 37 adapted to be engaged by clamps (not shown) well known in foundry practice for detachably securing mold-sections together.

The chill B is supported from the dragcasing A as already indicated, and as the lowermost and solid chill-ring is arranged concentrically relative to the drag-cavity (L it is obvious that the remainder of the chill which is built up upon and concentric relative to the said solid ring is accurately centered relative to the said cavity.

By the construction hereinbefore described it will be observed that each chill-ring, save the lowermost and solid chillring, rests on and is held to the next lower chill-ring, and that the sections of the upper of adjacent chill-rings snugly embrace at their lower ends the upper ends of and rest on the sections of the lower of the said rings. It will be observed therefore that the chill-rings are effectually locked together and to the dragcasing when upward displacement in any approved manner of the uppermost or top ring is prevented.

The chill B (see Fig. l) is provided internally with downwardly and inwardly sloping seat-forming surfaces 40 extending circumferentially of the chill and arranged at different elevations respectively. The seat-forming surfaces 10 are parallel and preferably correspond in size diametrically at their upper extremities. That is, the upper extremities of the seat-forming surfaces ll) are shown arranged in the same plane vertically. The upper of adjacent seat-forming surfaces 40 is longer vertically or longitudinally of the chill than the lower of the said surfaces so that the lower end of the lower of adjacent seat-forming surfaces is larger diametrically than the lower end of the upper of the said surfaces, and consequently the chill-chamber forming surface 40 is formedinternally b is larger diametrically at the lower extremity of the lower of adjacent seat-forming surfaces than at the lower extremity of the upper of the said surfaces. Asloping seatof each ring 26 of the lower portion of the chill, and obviously by the construction, hereinbefore described the upper of adjacent rings of the said lower portion of the chill forms a larger portion vertically of the chill-chamber than the lower of the said rings.

It will be observed that several seat-form'- ing surfaces 40 are formed in the comparatively long ring 33 whichforms the upper portion of the chill.

By the construction hereinbefore described it will be observed that the sloping seatforming surfaces 40 of the chill are spaced farther apart toward. the upper end of the chill; that each of the said surfaces is formed upon a rib-forming portionb of the chill; that the chill is therefore provided with ribs 1) which extend oircumferentially of the chillchamber b and are arranged at diflerent elevations respectively; that each rib b" is rovided with a downwardlyand inwardly s oping seat-forming surface 40 extending; circumferentially of the chamber, and that the upper of ad%acent ribs 1) is lar er in dimensions lateral y and longitudinal y of the chill than the lower of the said ribs.

I would here remark that the horizontal contraction of the roll-body-forming portion of the casting gradually increases toward the upper end of the chill, and obvious therefore is the importance of the hereinbefore described relative dimensions and arrangement of the sloping seat-forming surfaces 40 when parallelism of the said seat-forming surfaces or convenience and economy of construction is to be maintained.

By the hereinbefore described relative arrangement and dimensionsof the seat-forming surfaces 40, notwithstanding that the said surfaces are parallel, the contracting casting is accurately centered relative to and from end to end of the chillby the said seatforming surfaces during any loweringof the casting while the casting is cooling or contracting. g i

In casting a roll by my improvedmoldthe peripheral crust or shell of the casting formed in and by the chill is during its contraction maintained in a strictly central position relative to the chill and sup orted circumferentially of and upon the slipping seat-forming surfaces 40 at different tively. intervals vertically as there are seat-forming surfaces 40 so that the said shell or crust is not liable to be cracked or put out offround or rendered defective by the pressure of molten metal within and centrally of the casting. The lower cope-casingsectionK, and consequently the cope, (see Figs. 1 and 2) are elevations respec- The casting is supported at as manyv the body of loam or sand A adjustable vertically as will hereinafter appear, and, as already indicated, supported from the chill. y

The flange K (see Figs. 1 and 2) of the said cope-casing-section K overhangs lugs 38 which are formed on and externally and s aced circumferentially of the upper end of t e chill.

.The means for supporting the co e from the chill is shown to' consist of severa screws Z which are arranged vertically and enga e the upper end of the chill, resting upon tfle chill and engaging correspondingly screwthreaded holes formed in the flange K of the lower cope-casing-section K and instrumental in preventing of the upper portion the chill when thecope, as shown, is attached to the chill in any approved manner, as, for instance, by bolts R and nuts r.

Through each lug 38 loosely extends a bolt R whose shank extends also and loosely through and a suitable distance above the flange K. The said bolt R is arranged with its headunder the said lug. A correspondingly screw-threaded nut r is mounted on the shank of the bolt above the said flange, and washers t are interposed between the flange K and the nuts 1". The bolts R, nuts rand washers t constitute means for preventing upward displacement of the cope.

Obviously the co e can be lowered or adjusted'vertically re ative to the chill by a proper manipulation of the screws Z and nuts 1'.

Preparatory to any lowering of the casting eration of the mold continuity during the o in the latera ly extending portion A of the runner-gate is interrupted at the interior of the drag-casing E by a suitably operated outoff it which (see Figs. 7, 8 and 9) is shown borne by the flange F of the head F. Preferably the flange F is provided externally of its upperportion with a guideway 42 which extends a suitable distance circumferentially of the flange from the laterally extending portion A of the runner-gate to a slot 43 formed in the drag-casing E, and the cut-off u consists of a metal plate which engages the said guideway and is seated upon the bottom wall of the said guideway. Normally the-cut-off is arranged at one side of the laterally extending portion A of the runner-gate, as shown very clearly in Figs. 7, 8 and 9 but is actuated at the proper time and in any approved manner circumferentially of the flange F and into position "interrupting. continuity in the said portion of the runner-gate so as to separate any molten metal within the said portion of w the latter extends into from any metal latter is stationof the vertically drag-casing E. It that the cut-off u is the runner-gate where in the runner-gate where the ary and arranged externally movable contents of the will be observed therefore adapted to be lowered with the downwardly 1 member as.

movable portion of the drag, and the slot 43, which is formed in the drag-casing to afford access to the guideway 42 and consequently to the cut-off, extends far enough circumferentially of the casing to accommodate the insertion into the said guideway of a tool or instrument (not shown) suitable for use in actuating the cut-off.from its normal and inoperative position into its operative and run ner-gate-obstrueting position.

, The chill B (see Fig. 1) is providedin one of the rings of its lower portion with a horizontally arranged hole 45 which extends laterally from the interior to the exterior of the chill. A correspondingly arranged endwise shiftable bar or member it engages the hole 45 and is movable inwardly. The member 00 extends a suitable distance outwardly beyond the exterior of the chill and has a beveled inner end arranged flush in the outer and normal position of the member 0a with the seat-forming surface 40 formed internally of the said ring. The member so is provided next externally of the chill with a screw-threaded portion at, and a nut 00 is mounted on the said screw-threaded portion and forms an adjustable stop for limiting the inward movement of the said member as.

The outer end of thenut 90 forms a laterally and outwardly facing shoulder on the member (13, and an upright lever m (see Figs. 1 and 5) overlaps the said shoulder and is arranged to actuate the said member a; inwardly against the action of a suitably applied spiral spring w. The lever m extends upwardly to the upper end of the mold and is suitably fulcrumed, as at m, a short distance above the member as to a bracket n which projects laterally and outwardly from and is rigid with the chill-ring through which the said member 00 extends. The bracket n is provided at its outer end with a depending arm a which affords bearing to the member as. The member acextends outwardly through and a suitable distance beyond the bracket-arm a and a nut x is mounted on the outer end of the said member at, and the spring w is preferably mounted and confined on the member a: between the said nut and the bracket-arm and automatically acts to retain the said member as in its outer position.

Means for preventing turning of the end wise shiftable bar or member at is provided and preferably comprises a lug 0: formed on the free end of the said member a; and projecting into an enlargement 41 of the inner end of the hole 45.

The lever m (see Figs. 1 and 2) overlaps a lug 46 formed on the cope-casing-flange K in the outer and normal position of the member 00. An endwise shiftable pin 47, which has bearing in the lever m, engages a hole 48 formed in the said lug and thereby locks the lever in the outer position of the It will be observed therefore that the provision of the pin 47 within the lug 46 looks the member a: in its outer position against the action of the spring 11), and that a removal of the said pin from the lug 46 renders the spring free to actuate the said member a: as far as the engagement ofthe adjustable stop with the lever on will permit. The lever 171., when it is unlocked by the witlulrawal of the pin 47, is actuated in the direction required to move the member a", inwardly against the action of the spring w by the action of a weight 1 with which the lever is provided at the outer side but above the fulcrum of the lever, but of course the lever and consequently the member are not unlocked until after the formation of the desired crust or shell of the roll-body-forming portion of the casting during the operation of the mold has progressed far enough.

Briefly described the operation of my improved mold is as follows :By manipu lating the screws Z and nuts '1 the cope is properly adjusted relative to the chill whereupon the molten metal employed in casting a roll is introduced through the runnergate to the drag-cavity (1 filling the said cavity and then rising into and filling the chill and then rising into and within the cope-chamber 13 until the level of the molten metal within the cope-chamber has risen as far as the upper end of the lower cope-part. The upper cope-part is pref erably kept off the mold preparatory to the pouring of the mold so that the operators or attendants can skim off any dirt or dross appearing at the level of the molten metal when the said level rises to the upper end of the lower cope-part. When the molten metal has had all the dross and dirt skimmed therefrom and the fed metal has settled down from the lower cope-p art to nearly fully feed the chill the upper cope-part is placed and fastened in position upon the lower copepart, and molten metal is then poured into the feeding head from above to supply the cope after which by the use of a feeding rod worked up and down round the wabble forming portion and inner end or main portion of the roll-neck to be cast within the cope a good union of the metal below the wabble and the metal introduced from above is effected. The cut-ell a is of course actuated into its runner-gate-obstructing or operative position as soon as the mold is poured. The molten metal introduced. into the mold is permitted to stand until it shall have formed a suitable shell or crust in the chill whereupon the cope and. the head F are lowered, the cope being lowered by a proper manipulation of the screws 7, and nuts 1", and the head i being lowered upon unlocking and thereupon manipulating the lever G as required to openv the valve d and areas the ring a which bears the upper of the superimposed bodies of, loam or molding.

sand of the drag is unlocked by withdrawing the pins a from the said ring so as to permit the said ring and its body of loam or molding sand to lower with the body of loam or molding sand A. Obviously the casting and the bodies of loam or molding sand which form the drag-cavity (t descend by gravity or by gravity with the assistance of downward pressure exerted downwardly on the cope and consequently downwardly on the roll-body-forming portion of the casting by a proper manipulation of the screws Z and nuts 1*. By lowering the casting during the operation of the moldthe beads or ribs which are formed on and externally of the crust or shell of the rollbody-forming portion of the casting and next over the seat-forming surfaces 40 of the chill-rings are kept in contact with the said seat-forming surfaces tion of the mold. erted downwardly upon the upper end of the roll-body-forming metal to form a good union between the upper neck and the 'rollbody, or for other reasons, the cope is lowered independently of the remaining portions of the mold by a proper manipulation of the screws Z and nuts 1" without ermitting the descent of the casting during the exertion of pressure downwardly upon the upper end of the roll-body-forming portion of the casting. When the eripheral crust or shell of the roll-bodyormmg portion of the casting has formed or progressed far enough in the chill the member a: is unlocked and thereby rendered free to'move into the chill to ascertain the amount of horizontal contraction of the roll-body-forming portion of the casting.

In removing the casting from the mold the cope is of course first removed, whereupon the chill-rings are readily removed one at a time and in order.

What I claim is 1. In a mold for casting a chilled roll, a vertically arranged annular chill provided internally with downwardly and inwardly sloping seat-forming surfaces arranged at different elevations respectively and extending circumferentially of the chill, and the upper of adjacent seat-formin surfaces beduring the operaing smallerdiametrically at its ower extremity than the lower of the said surfaces so that the chamber of the chill is larger diametrically at the lower extremity of the lower of adj acent seat-forming surfaces than at the lower extremity of the upper of the said surfaces.

2. In a roll-casting mold, a vertically arranged annular chill provided internally with the head F to descend If pressure is to be excorrespondingly downwardly and inwardly sloping parallel seat-forming surfaces ',ar ranged at different elevations respectively and extending circumferentially of the chill, said seat-forming surfaces corresponding diametrically at their upper ends, and the upper of adjacent seat-forming surfaces being smaller diametrically at its lower extremity than the lower of,,the said surfaces so that the chamber of the chill is larger diametrically at the lower extremity of the lower of adjacent seat-forming surfaces than at the lower extremity of the upper of the said surfaces.

3. In a roll-casting mold, an upright chill having a circular chamber and provided internally with parallel downwardly and in wardly sloping seat-forming surfaces arranged at diflerent elevations respectively and extending circumferentially of the chamber, and the upper of adjacent seat-forming surfaces being longer vertically of the chill and extending farther inwardly than the lower of the said surfaces.

4. In a roll-casting mold, an upright chill having an internal chamber which extends from end to end of the chill, and provided internally with downwardly and inwardly sloping seat-forming surfaces arranged at different elevations respectively and extending circumferentially of the chamber, and the lower ends of the said seat-forming surfaces being spaced farther apart toward the upper end of the chill, and the upper of adjacent seat-forming surfaces being smaller diamet rically at its lower extremity than the lower of the said surfaces so that the chamber of the chill is larger diametrically at the lower extremity of the lower of adjacent seat-forming surfaces than at the lower extremity of the upper of the said surfaces.

5. In a roll-cas ting mold, an upright chill having a circular chamber which extends from end to end of the chill, and provided internally with downwardly and inwardly sloping seat-forming surfaces arranged at different elevations respectively and extending circumferentially of the chamber, and the upper of adjacent seat-forming surfaces being smaller diametrically at its lower extremity but larger indimensions vertically than the lower of the said surfaces.

6. In a roll-casting mold, a vertically arranged chill having its lower portion composed of superimposed rings which are ar ranged in line vertically and, except the lowermost ring, divided vertically into sections, with the lower of adjacent rings of the said portion of thev chill provided at the top with a rib extending circumferentially of the chill and projecting into and overlapped on both sides by the upper of the said rings, and the uppermost of the said rings being embraced by the upper portion of the chill, and each of the said rings and the upper portion of the chill being provided internally with suitably sloping seat-forming surfaces having such relative arrangement and dimensions that the casting produced 111 the mold durmg the operation of the mold shall during its contraction rest entirely upon the said seatforming surfaces.

7. In a roll-casting mold, a vertically arranged chill having its lower portion com posed of superimposed rings which are arranged in line vertically and provided internally with downwardly and inwardly sloping seat-forming surfaces extending circumferentially of the chill, said chill having its upper portion composed of a comparatively long ring divided vertically into sections and provided internally with a plurality of down wardly and inwardly sloping seat-forming surfaces extending circumferentially of the chill, and the last-mentioned seat-forming surfaces and the first-mentioned seat-forming surfaceshaving such relative arrangement and dimensionsthat the casting produced in the mold during the operation of the'mold shall during its construction have bearing upon the said seat-forming surfaces.

8. In a roll-casting mold, a vertically arranged chill having its lower portion composed .of superimposed rings which are arranged in line vertically and provided internally with suitably sloping seat-forming surfaces extending circumferentially of the chill, said chill having its upper portion com posed of a comparatively long ring divided vertically into sections and provided internally with a plurality of suitably sloping seat-forming surfaces extending circumferentially of the chill, said sections of the lastmentioned ring being suitably held in place, and the lower of adjacent rings of the chill being embraced at its upper end by the lower end of the u per of the said rings.

9. In a ro l-casting mold, a vertically arranged chill having its lower portion composed of superimposed rings and having all the rings above the lowermost ring divided vertically into sections, with the sections of the uppermost ring suitably held in place, and with the sections of the lower of adjacent sectional rings embraced at their upper ends by the lower end of the upper of the said rings, and the said rings being provided internally with parallel downwardly and inwardly sloping seat-forming surfaces ex tending circumferentially of the chill, with the seat-forming surface in the upper of adjacent rings smaller diametrically at its lower extremity than the seatforming surface in the lower of the said rings.

10. In a roll-casting mold, an upright chill having a circular chamber which extends from end to end of the chill and provided internally with ribs which extend circumferentially of the chill and are arranged at different elevations respectively, and each rib being provided with a downwardly and inwardly sloping seat-forming surface extending circumferentially of the chamber, and the upper of adjacent ribs being larger in dimension laterally of the chill and extending farther inwardly than the lower of the said ribs.

11. In a roll-casting mold, an upright chill having a circular chamber which extends from end to end of the chill and provided. internally with ribs which extend circumferentially of the chill and are arranged. at different elevations respectively, and each rib being provided with a dowmrardly and inwardly sloping seat-forming surface extending circumferentially of the chamber, and the upper of adjacent ribs being larger in dimensions laterally and longitmlinally of the chill and extending farther inwardly than the lower of the said ribs.

12. In a roll-casting mold, the combination, with an upright chill having a circular chamber which extends from end to end of the chill, and provided with a hole which extends from the interior to the exterior of the chill, of an endwise shiftable bar or member engaging and movable endwise of the said hole and into the chamber and in its outer and normal position being arranged externally of the chamber, said endwise shift-able member extending a suitable distance outside of the chill and scrmv-threaded at the outer side of the chill; a nut mounted on the screwthreaded portion and forming an adjustable stop for limiting the inward movement of the said endwise shiftable member means acting to actuate the said endwise shiftable member inwardly, and means for holding the said endwise shil'table member in its outer and normal position.

13. In a roll-casting mold, the combination, with an upright chill having a circular chamber which extends from end to end of the chill, said chill being provided with a hole which extends from the interior to the exterior of the chill, of an endwise shiftable bar or member engaging and movable endwise of the said hole and into the chamber and in its outer and normal position being arranged externally of the chamber, said endwise shiftable member extending a suit able distance outside of the chill, and means automatically acting to retain the said end wise shiftable member in its outer position, and means for shifting the said endwise shiftable member inwardly.

14-. In a roll-casting mold, the combination, with an upright chill having a circular chamber which extends from end to end of the chill, said chill being provided with a hole which extends from the interior to the exterior of the chill, of an endwise shiftable bar or member engaging and movable endwise of the said hole and into the chamber and in its outer and normal position being arranged externally of the chamber, said .l. l O

; ranged chill having its lower posed of superimposed rings w ich are proendwise shiftable member extending a suitable distance outside of the chill and provided externally of and a suitable distance from the chill with a laterally and outwardly facing shoulder; a suitably supported lever overlapping the said shoulder and arranged to actuate the said endwise shiftable member inwardly; a spiral spring mounted and confined on the said endwise shiftable member and acting to retain the endwise shiftable member in its outer position, and means for locking the lever in the said outer position of the said endwise shiftable member.

1 5. In a roll-casting mold, the combination,

. with an upright chill having a circular chamber which extends from end to end of the chill, said chill being provided with a hole which extends from the interior to the exterior of the chill, of an endwise shiftable bar or member enga ing and movable endwise of the said hole an into the chamber and in its outer and normal position being arranged externally of the chamber, said endwise shiftable member extending a suitable distance outside of the chill and provided also externally with an outwardly facing shoulder ;-a lever overlapping the said shoulder and arranged to actuate the said endwise shiftable member inwardly; a stationary bracket supporting the lever and having an arm affording bearing to the said endwise shiftable member; a spiral spring mounted and con-' fined on the said endwise shiftable member at the outer side of the said arm and acting to retain the endwise shiftable member in its outer position, and means for locking the lever in the said outer wise shiftable member.

16. In a roll-casting mold, the combination, with an upright chill havin a circular chamber which extends from en' to end of the chill, and provided internally with suitably sloping seat-forming surfaces arran ed at different elevations respectively, said 0 ill being provided with a hole which extends from the interior to the exterior of the chill, of an endwise shiftable bar or member engaging and movable endwise of the said hole and into the chamber and in its outerand normal position being arranged externally of the chamber, and means whereby turning of the said endwise shiftablemember is prevented.

17. In a roll-casting mold, a vertically arortion comvided internally with suitably sloping seatforming surfaces extending circumferentially of the chill, said chill having its upper portion composed of a comparatively long ring dividedvertically into sections and provided internally with a plurality of suitably sloping seat-forming surfaces extending circumferentially of the chill, and theuppermost ring of the first-mentioned or lower portion of the end positionof the said endwardly movable portion which has a chill being provided externally with lugs overlapping the exterior of the lower ends of the sections of the ring formin the upper portion of the chill, and wedges etween the ugs and the said ring-sections.

18. In a roll-casting mold, a suitably supported upright chill provided at the upper and externally with lugs which are spaced circumferentially of the chill and having a chamber extending from end to end of the chill, said chill being composed of su erimposed rings; a lower mold-part or rag having a cavity which is provided with an inlet and communicates with the chill-chamber at the lower end of the chill; an up er mold-part or cope provided with a chamber which communicates with the chill-chamber at the upper end of the chill, said cope comprising a casin which is provided externally with a lateral y and outwardly projecting flange which extends circumferentially of the cope and overhangs the aforesaid lugs; screws screwed into the said flange and extending through the flange into engagement with the upper end of the chill; bolts extending loosely through and a suitable distance above the flange and loosely through the aforesaid lugs, which bolts are arranged with their heads under the lugs; nuts on the bolts above the flange, and washers interposed between the flange and the nuts.

19. A roll-castin mold comprising a suitably supported upright chill; a suitably supported upper mold-part or cope arrangedand adapted to be lowered within the chill; a lower mold-part or drag having a downcavity communicating with the chill at the lower end of the chill, said drag comprising a stationary casing which is arranged externally and extends circumferentially of the said movable portion of the drag and has a perforated bottom which is arranged a suitable distance below the cavity, the drag also having a runner-gate which extends through the sad casing and communicates with the cavity, and the cavity-connecting portion of the runner-gate being adapted to lower with the aforesaid movable portion of the drag; means for interrupting continuity in the runner-gate between the stationary portion and downwardly movableportion of the runnergate; a body of loose fluent material inter posed between the aforesaid bottom and the aforesaid movable portion of the drag, and a valve arranged to control the discharge of material through the said bottom.

20. A roll-casting mold comprisin a suitably supported upright chill; a suita ly supported upper mold-part or cope arranged and adaptedto be lowered within the chill; .a

lower mold-part or drag having a downwardly movable portion which has a cavity communicating with the chill at the lower end of the chill, said drag comprising a staf movable portion of the drag, and the drag tionary casing which is arranged externally and extends circumferentially of the said also having a runner-gate which extends through the casing and communicates with the cavity, and the cavity-connecting portion of the runner-gate being adapted to lower with the aforesaid movable portion of the drag, and a cut-off for interrupting continuity in the runner-gate between the downwardly movable portion and stationary portion of the runner-gate, said cut-off being movable downwardly with the aforesaid movable portion of the drag.

21. A roll-casting mold comprising a suitably supported upright chill; a suitably supported upper mold-part or cope arranged and "adapted to be lowered within the chill; a

lower mold-part or drag having a downwardly movable portion which has a cavity communicating with the chill at the lower end of the chill, said drag comprising a stadrag, said head being supported as required to render it capable of moving downwardly and bearing the cutoff.

22. A roll-casting mold comprising asuitably supported upright chill; a suitably supported upper mold-part or cope arranged and adapted to be lowered within the chill; a lower mold-part or drag having a down wardly movable portion provided with a cavity which communicates with the chill at the lower end of the chill and has an inlet,

and a head arranged under and forming a support for the said downwardly movable portion of the drag, said head being supported as required to render it capable of being lowered and provided with an arm projecting laterally and outwardly beyond the exterior of the drag.

23. A roll-casting mold comprising a suitably supported upright chill; a suitably supported upper mold-part or cope arranged and adapted to be lowered within the chill; a lower mold-part or drag having a downwardly movable portion provided with a cavity which communicates with the chill at the lower end of the chill and has an inlet, said drag comprising a stationary casing extending circumferentially of and a suitable distance below the said downwardly movable portion of the drag; and a head arranged. under and forming a support for the aforesaid. movable portion of the d eg and being contained within the aforesaid casing and supported as required to render it capable of being lowered, said head being provided with an upwardly projecting flange having a latorally and outwardly projecting arm extending externally of the said casing, and the casing being slotted vertically to accommodate the location of the said arm during the descent of the head.

24. A roll-casting mold. comprising a suitably supported upright chill; a suitably supported upper mold-part or cope arranged. and adapted to be lowered within the chill; a lower mold-part or drag having a downwardly ,movable portion provided with a cavity which communicates with the chill at the lower end of the chill, said drag comprising a stationary casing extending circumferentially of the aforesaid movable portion of the drag and a runner-gate which extends through the casing and communicates with the drag cavity, the cavity-connecting portion of the runner-gate being formed in and adapted to lower with the aforesaid movable portion. of the drag; a head supporting the said movable portion of the drag and arranged within the aforesaid casing and supported as required to render it capable of being lowered, said head being provided with an upwardly projecting flange provided externally with a guideway, and a cut-off engaging the guideway and supported from the head, said outoff being normally arranged externally of the aforesaid runner-gate but movable into a position obstructing continuity in the runnergate at the outer end of the aforesaid downwardly movable portion of the runner-gate.

25. A roll-casting mold comprising a suitably supported upright chill; a suitably sup ported upper mold-part or cope; a lower mold-part or drag having a downwardly movable portion provided with a cavity which communicates with the chill at the lower end of the chill and. has an inlet, said drag comprising a stationary casing extending circumferentially of the said movable portion of the drag and having a perforated bottom which is arranged. a suitable distance below the drag-cavity; a body of lluent material between the said bottom aml the aforesaid movable portion of the drag, and a retary valve arranged to control the discharge of material through the said. bottom.

26. A roll-casting mold comprising a suitably supported upright chill; a suitably supported upper mold-part or cope; a lower mold-part or drag having a downwardly mov-. able portion provided with a cavity which communicates with the chill at the lower end of the chill and has an inlet, said drag com prising a stationary casin g extending circumferentially of the said movable portion of the drag and having a perforated bottom which 27. A roll-casting mold comprising a suit-' ably supported upright chill; a suitably supported upper mold-part or cope; a lower mold-part or drag having'a downwardly movable portion provided with a cavity which communicates with the chill at the lower end of the chill and has an inlet, said drag comprising a stationary-casing which has a perforated bottom arranged a suitable distance below the drag-cavity; a body of'fluent material between the said bottom and the aforesaid movable portion of the drag; a valve supported from the said bottom and controlling the discharge of material through the said bottom, and lever-mechanism for operating the valve.

28. A roll-casting mold comprising a suitably supported upright chill; a suitably supported upper mold-part or cope; "a lower mold-part or drag having a downwardly movable portion provided with a cavitywhich communicates with the chill at the lower=end of the chill and has an inlet, said drag comprising astationary casing which has a bottom arranged a suitable distance below the said 3 5 movable portion of the drag and provided with a centrally located hole and perforations spaced equidistantly from and circumferentially of the said hole; a rotary valve proe vided centrally with a cylindrical lug extend-,

ing into the aforesaid centrally arranged hole, said valve having perforations which are in registry or out of registry with the firstmentioned perforations according as the valve is in its normal or closed position or 43 has been turned in its open position, and a body of fluent material between the aforesaid casing-bottom and the aforesaid movable portion of the drag.

29. A roll-casting mold comprising a suitably supported upright chill; a suitably supported upper mold-part or cope; a lower mold-part or drag having a downwardly movable-portion provided with a cavitywhich communicateswith the chill at the lower end of the chill and has an inlet, said drag comprising a stationary casing which has a bottom arranged a suitable distance below the said movable portion of the drag and provided with a centrally located hole and per- (30 forations spaced around and a suitable distance from the said hole; a conical rotary valve arranged over the aforesaid bottom and provided on its underside and centrally.

rwith a cylindrical lug depending into the c5 aforesaid centrally arranged hole, said valve having perforations which are in registry or out of registry with the first-mentioned perforations according as the valve is in its normal or clos:d position or has been turned into its open position, and a body of fluent material between the aforesaid casing-bottom and the aforesaid movable portion of the drag and filling the space formed around the conical valve.

30. A roll-casting mold comprising a suitably supported upright chill; a suitably sup ported upper mold-part or cope; a lower moldart or drag having a downwardly mova le portion provided with a cavity which communicates with the chill at the lower end of the chill and has an inlet, said drag comprising a stationary casing having a perforated bottom arranged a suitable distance below the said movable portion of the drag; a body of fluent material interposed between the said movable portion of the drag and the said bottom; avalve for controlling the discharge of material through the said bottommeans for operating the valve, and means whereby the discharge of material through the said bottom is indicated externally of the dra i 3%. A roll-casting mold comprising a suitably supported upright chill; a suitably supported upper mold-part or cope;'a lower moldart or drag having a downwardly mova 1e portion provided with a cavity which communicates with the chill at the. lower end of the chill and has an inlet, said drag comprising a stationary casing which has a perforated bottom arranged a suitable distance below the drag-cavity; a body of fluent material between the said bottom and the aforesaid movable portion of the drag; means for controlling the discharge of material through the perforated bottom, and means whereby the discharge of material through the said bottom is indicated externally of the drag and at an elevation above the said bottom. 7

32. A roll-casting mold comprising a suitably supported upright chill; a suitably supported upper mold-part or cope; a lower mold-part or drag having a downwardly movable portion provided with a cavity which communicates with the chill at the lower end of the chill and has an inlet, said drag comprising a stationary casing which has a perforated bottom arranged a suitable distance below the drag-cavity; a body of fluent material between the said bottom and the aforesaid movable portion of the drag; means for controlling the discharge of material through the perforated bottom; means whereby the descent of the said movable portion of the drag is mechanically indicated externally of the aforesaid casing, and means whereby the discharge of material through the aforesaid perforated bottom is indicated externally of the'mold.

33. A roll-casting mold comprisin a suitably supported upright chill; a suita ly supported upper mold-part or co e; a lower mold-part or drag having a downwardly movable portion provided with a cavity which communicates with the chill at the lowerend of the chill and has an inlet, said drag comprising a'stationary casing which has a perforated bottom arranged a suitable distance below the drag-cavity; a body of loose fluent materialbetween the said bottom and the aforesaid movable ortion of the drag; means for controlling the discharge of material through the perforated bottom; a receptacle arranged under the bottom and'in position to receive material discharged through the bottom; a suitably supported lever supporting the receptacle, and an u right rod arranged at one side of the mo d and operatively connected with the lever.

34. A roll-casting mold comprisin a suitably supported upright chill; a suita ly supported upper mold-part or co e; a lower mold-part or drag havin a' downwardly movable portion provide with a cavity which communicates with the chill at the lower end of the chill and has an inlet, said drag comprisin a stationary casing which has a perforate bottom arranged a suitable distance below the drag-cavity; a body of fluent material between the said bottom and the aforesaid movable portion of the drag;

. means for controlling the discharge of material through the perforated bottom; a receptacle arranged under the bottom and in position to receive material discharged through the said bottom, said receptacle being provided with two trunnions arranged at opposite sides respectively of the receptacle and in line endwise; a suitably supported lever arranged under the receptacle and provided at one side of its fulcrum with upwardly rojecting arms affordin bearing to the afliresaid trunnions, and a aterally supported upright rod operatively connecting with the lever at the other side of the fulcrum and extending to the upper end of the mold. Y

' 35. A roll-casting mold comprising a suitably supported upright chill; a suitably supported upper mold-part or cope; a lower moldart or drag havin a downwardly mova le portion provide with a cavity which communicates with the chill and has an inlet, said cavity being formed in and by two superimposed bodies of molding sand; a ring surroun ing and sup orting the upper of the said superiin osed bodies; a head arranged under the ower of the said superimposed bodies and supported as required to render it ca able of being lowered; and means for locliing the said ring in its upper position.

36. A roll-casting mold comprising a suitably supported upper mold-part or cope; a lower mold-part or drag having a downwardly movable portion provided with a cavity which communicates with the chill at the lower end of the chill and has an inlet, said drag comprising a stationary casing, and an upright chill interposed between the drag and the cope and having a chamber extending from end to end of the chill and communicatin at its lower end with the dragcavity, said chill being provided internally with downwardly and inwardly sloping seat-forming surfaces extending circuinferentially of the chill and arranged at different elevations respectively, and that ortion of the chill which is provided with t 1e lowermost of the aforesaid seat-forming surfaces being integral with the adjacent portion of the aforesaid drag-casing.

37. In a roll-casting mold, an upright chill havin a circular chamber and )rovided internalfy with seats arranged at iiferent elevations respectively and extending circumferentially of the chamber, and the upper of adjacent seats extending farther inwardly than the lower of the said seats.

In testimony whereof, I sign the foregoing specification, in the presence of two witnesses.

RALPH H. WEST.

Witnesses:

DANIEL E. DALY, N. L. McDoNNELL.