US853490A - Mold for casting chilled rolls. - Google Patents

Description

No. 853,490. PATENTBD MAY 14, 1907.

' R. H; WEST.

MOLD FOB. CASTING GHILLBD ROLLS.

. APPLIOATION FILED 00129. 1906.

/ I I I fi u m2ss: I 4 I 1 MIEIM'OII j; I BY S r "I nfiousrs .Ths NORRIS PETERS so, wnsumomn n. c

'ZIEL "5" VELQQ W No. 853.490. PATENTED MAY 14, 1907.

R. H. WEST. MOLD FOR CASTING GHILLED' ROLLS.

APPLIOATION FILE D 00129. 1906.

WIT/158858.

I Arroqurs 1H: "emu; Fs'r's'Rs co., WASHINGTON, D. c.

UNITED STATES PATENT OFFICE.

MOLD FOR CASTING CHILLED ROLLS.

I Specification of Letters Patent.

Patented May 14, 1907.

Application filed October 29, 1906. Serial No. 341,065.

To ll/Z7 whom it may concern:

Be it known that I, RALPH H. Wns'r, a citizen of the United States of America, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented cer tain new and useful Improvements in Molds for Casting Chilled Rolls; and I hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

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 chilled rolls in obtaining castings which have all the requirements essential for the production of a chilled roll. in which the chilled peripheral crust or shell 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 general object in view, my invention consists, first, in the provision of means whereby the upper mold-part or cope, the lower mold-part or drag and the casting can be shifted vertically simultaneously while the chill remains stationary; second, to provide means whereby the horizontal contraction of the cooling crust or shell of the rollbody-forming portion of the casting is automatically measured and indicated; third, to provide a chill which is not only stationary relative to the cope and drag, but which is reversible end for end and provided with such contour interiorly as to cause the crust or shell of theroll-body-forming portion of the casting to be accurately centered during the operation of the mold by lowering the drag and cope simultaneously while the chill remains stationary fourth, to provide a chill which is horizontally divided into sections, with the joint between adjacent sections located between the top and bottom walls of one of the circumferentially extending grooves or chamber-enlargements formed in the surrounding wall of the interior chamber of the chill, and fifth, to so construct the cope that the surrounding wall of the copechamber in which a neck of the roll being cast is formed is depressible independently of the chill and drag at any time during the cooling or contracting operation of the casting.

upper end of the chill-chamber 12.

With these objects in view, and to the end of realizing other advantages hereinafter apearing, this invention consists in certain "eatures of construction, and combinations of parts, hereinafter described and pointed out in the claims.

In the accompanying drawings, Figure 1 is a central vertical section of a roll-casting mold embodying my invention. In this figure the mold is shown within a pit. Fig. 2 is a top plan relative to Fig. 1. Fig. 3 is an enlarged sectional view illustrating a POI tion of the central mold-part or chill. Fig. 4 is a horizontal section on line 4%, Fig. 1, looking downwardly. Fig. 5 is a horizontal section on line 55, Fig. 1, looking down wardly, and portions are broken away in Fig. 5 to more clearly show the construction. Figs. 6, 7 and 8 are vertical sections in detail on lines 6-6, 7-7 and 88, respectively, Fig. 1.

In the accompanying drawings, P (see Figs. 1 and 2) represents a pit within which my improved roll-casting mold is placed and operated. The-said mold (see Fig. 1) comprises a lower moldpart or drag A, a central mold-part or chill B and an upper mold-part or cope O.

The chill B (see Figs. 1, 3, 4 and 5) is stationary, being supported preferablyas will hereinafter appear. The chill B is cylindrical and provided interiorly with a circular chamber 12 which extends verticallythrou h alrlidl consequently from end to end of the c 1 The upper mold-part or cope O (see Figs. 1 and 2) is circular and 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 12. The cope O depends into and snugly but-slidably fits within the The cope O is supported as will hereinafter appear from the chill in such a manner as to render tlkile1 1cope capable of being lowered within the c 1 The drag A (see Figs. 1 and 5) is circular and provided with a cavity (1 arranged centrally of the drag and extending downwardly from the up er end of the drag a suitable distance. T e cavity a is arranged centrally of the lower end of and in cornmunication with the chill-chamber 12. The drag A is suspended from and movable with the cope as will hereinafter more fully appear. The drag A projects into the lower end of the chill-chamber 12, snugly but slidably fitting Within the said end of the said chamber.

The body of the roll to be produced is cast in the chill B whereas the necks of the roll are cast in the drag and cope. The dragcavity a and the cope-chamber 13 are of course enough smaller diametrically than the chill-chamber 12 and have the general outline required to form the necks of the roll to be cast. I

The surrounding wall or walls of the dragcavity a and the bottom of the said cavity are built up of loam or molding sand a within and surrounded by a metal casing G which extends also under and supports the said wall or walls, as at 10, Fig. 1. The cavity a is provided at one side and a suitable distance below the upper end of the cavity (see Fig. l) with an inlet 16 for molten metal, and the mold is poured through the said inlet. The surrounding wall of the copechamber 13 is formed by a body of loam or molding sand 14 which is built up or sup- -ported in any a proved manner within and surrounded by t e inner section is of a metal casing which comprises the said inner section and an outer section K. The outer cope-casing-section K is supported from the chill as will hereinafter appear to render the said section capable of being lowered within the chill-chamber 1 2. The outer co e-casingsection K depends into and is slidab e endwise of the upper end of the chill-chamber 12. The inner cope-casing-section 7c has lateral hearing within and extends from end to end of the outer cope-casing-section K and is lined interiorly with the loam or molding sand 14 employed in the formation of the surrounding wall or walls of the cope-chamber 13. The inner cope-casing-section 7c is supported at its upper end as will hereinafter appear from the outer cope-casing-section K.

The chill B is provided internally with vertically spacedannular grooves b which (see Figs 1 and 3) form diametrieal or lateral enlargements of the chill-chamber 12. That is, the chill is provided internally with vertically spaced ateral chamber-enlargements b which extend circumferentially of the chill.

The bottom wall of each chamber-enlargement b slopes downwardly and inwardly, but the slope of the bottom wall of the lower of two adjacent chamber-enlargements l) is less than the slope of the bottom wall of the upper of the said chamber-enlargements as indicated more clearly by the illustrative dotted lines 01 in Fig. 3. The top wall of each chamber-enlargement b slopes upwardly and inwardly, but the slope of the top wall of the upper of two ad acent chamber-enlargements is less than the slope of the top wall of the lower of the said chamber-enlargements, as indicated more clearly by the illustrative dotted lines e in Fig. 3. It will be observed therefore that my improved roll-casting mold comprises a vertically arranged chill which is provided with a chamber 12 which extends from end to end of the chill and is enlarged dian'ietrically or laterally at suitable intervals between the ends of the chill; that the slopes of the bottom walls of the en largen'lents b of the chill-chamber 12 gradually increase toward the upper end of the chill, and the slopes of the top walls of the said. chamber enlargements gradually increase toward the lower end of the chill, so that the chill so far as its internal chamberenlargements Z) are concerned, is reversible. end for end.

By the increase in the slopes of the bottom walls of the chamber-enlargements 1) toward the upper end of the chill the contracting casting is accurately centered relative to the chill by the said walls during any lowering of the casting while the casting is cooling or contracting and not yet free from the said chamber-enlargements In casting a roll by my improved mold the peripheral crust or shell of the casting formed in the chill is during its contraction maintained. in a strictly central position relative to the chill and supported circumferentially of and upon the downwardly sloping bottom walls of the chamber enlargements b. The casting is supported until near its final contraction at as many intervals vertically as there are chamber-enlargements b so that the said shell or crust is not liable to be cracked or put out of round or rendered defective by the pressure of molten metal within and centrally of the casting. It is obvious that the chamber-enlargements should" have such depth that when the casting formed in the chill has cooled sufficiently the external annular ribs or beads formed on the casting in the said chamber-enlargements shall be free from the said chamber-enlargements so as to permit the hoisting of the chill from the casting. The depth of the chamberenlargements 6 is exaggeratively illustrated.

The chill B is provided externally with two laterally and outwardly projecting annular flanges B and B which are spaced longitudinallyof the chill and equidistantly from opposite ends respectively of the chill. The flanges B and B are each provided with several holes 1) extending vertically through the respective flange and spaced circumferentially of the chill, and those portions of the upper surfaces of the upper flange B which surround the holes 2) in the said flange form seats for blocks D which are removably seated upon the said flange and (see Figs. 1 and 4) have their chill-facing surfaces arranged next and conforming to the adjacent exterior surfaces of the chill. Each block D is reduced transversely at its lower end, as at D, and the lower transversely reduced end D of the said block depends into and snugly fits within a hole 1) around the upper end of which the said block is seated. It will be observed tl'leref'ore that several blocks D are removably supported from the chill and spaced circumferentially of the upper end of the chill.

Each block D (see Figs. 1. and 4) is provided with ascrew-threaded hole D which extends vertically through the block and is engaged by a correspondingly externally threaded screw H which projects a suitable distance above the chill. Each screw H is tubular, that is,-provided with a hole h which extends vertically through the screw.

The outer cope-casing-section K is provided externally and about centrally between its ends with a laterally and outwardly projecting annular flange K which overhangs the screws H, and the drag-casing G is provided at its upper end and externally with a laterally and outwardly projecting annular flange G which is arranged in under the lower flange 13 of the chill.

Upright rods L which have externally screw-threaded ends, are arranged externally and spaced circumferentially of the chill and extend loosely through the flange K of the outer cope-casing-section K,

through the holes h in the screws H, through the holes I) in the flanges B and B" of the chill and loosely through the flange G. of the drag-casing G. Preferably the rods L where they extend through the flange G are an gular in cross-section, as shown in Figs. 1 and 5, and the holes 17 in the said flange which are engaged by the said angular portions of the said rods are correspondingly angular to prevent turning of the screws.

Nuts I are mounted on the rods L above the flange K of the outer cope-casing-section K, and washers J are preferably mtere posed between the said nuts and the said flange. Washers f are also preferably interposed between the flange K and the screws H. Nuts Z are mounted on the rods L next below the flange G of the drag-casing G. It will be observed therefore that-the outer cope-casingsection K, and consequently the cope C, are supported from the screws H, and that the cope is therefore supported from the chill but adjustable or shiftable vertically independently of the chill. It will be observed also that the rods L depend and are supported from the flange K of the outer cope-casing-section K, and that the drag A, being supported'from the said rods, is suspended from the cope and movable with the cope during the shifting of the cope vertically. The drag and cope are therefore capable of being lowered simultaneously while the chill remains stationary, and the cope and drag are lowered by properly manipulating the screws H.

It will be observed that the engagement of the transversely reduced lower ends of the blocks Dwith the holes I) prevents displacement of the said blocks laterally in any direction.

The chill B (see Figs. 1, 2 and 5) rests at its lower flange B upon stationary supports m arranged within the pit P an d spaced circumferentially of the lower end of thc'cl'lill, and the flange G of the drag-casing G is provided with recesses G which areengaged by the chill-supports m. The engagement of the chill-supports 'm with the recesses Gr in the said drag-casing-flange prevents circumferential displacement of the drag.

The provision of the chill with two flanges B and B accommodates the reversibility of the chill end for end.

The chill is preferably composed of sections and is shown divided centrally and horizontally or transversely into two sections, with the joint b between the sections (see Figs. 1 and 3) arranged between the top and bottom walls of one of the chamber-enlargements b. As the casting formed in the chill is liable to be imperfect at the joint between the chill-sections it is important that the joint be located between the top and bot tom walls of one of the chamber-enlargements 1) because the ribs formed on the casting within the chamber-enlargements b are subsequently cut away and the presence of imperfections in the said beads or ribs is therefore immaterial.

The drag-casing G (see Fig. 1) is provided interiorly under the lower end of the chill with a laterally and inwardly projecting annular flange g which terminates (see also in an annular member g which projects ber g projects far enough into the chillchamber 12 to insure the maintenance of a suitable joint between the drag and the chill during the simultaneous descent of the cope and drag in the operation of the mold, and the loam or molding sand which, as already indicated, forms the surrounding wall or walls of the drag-cavity a extends, as at a over the upper edge of the said member 9.

The loam or molding sand 14, which as already indicated, forms the surrounding wall or walls of the cope-chamber 18, extends to and in under the cope-casing-sections K and 76, as at 15 Fig. 1, being attached only however to the inner cope-casing-section 7c.

The outer cope-casing-section K (see Figs. 1 and 2) is provided at its upper end and externally with a laterally and outwardly projecting annular flange K The inner copecasing-section 76 extends a suitable distance above the outer cope-casing-section K and is provided at its upper end and externally with the outer cope-casing-section and in the normal and upper position of the inner cope-casing-section Ir relative to the outer co]f)cas ii'ig-section is arranged. a suitable distance above the said flange K. Screws it are screwed from below the flange K upwardly into correspondingly threaded holes K which are formed in the saidv :[lange at suitable intervals circuml 'erentially oi" the cope andv extcml-upwardly into engagement with the under side ol the flange Ir." of the inner orJpecasingsection. The screws it constitute vertically adjustable bottol'n-bearings for the flange /r: of the inner cope-casing-section which is therefore supported from the outer cope-casing-section as hereinbefore indicated. The outer cope-erising-section K is provided. at its upper end with vertically arranged screw-threaded holes K which are suitably spaced circumferentially of the cope and engaged by correspondingly threaded screws T which extend loosely through the flange 7c of the inner cope-casing-section 'and arranged with their heads in position to bear downwardly upon the inner cope-casing-section and prevent displacement of the inner cope-casing-section upwardly from the bearings a'llorded by the screws R. It is obvious that the inner cope-casing-section and conse-. quently the surrounding wall or Walls of the cope-chamber 13 can be lowered upon a proper manipulation of the screws R and 1" independently of the outer cope-casing-section K. Obviously by lowering the inner oope-easing-section'and with it the surrounding wall or walls of the cope-chamber 13 independently of the outer cope-casingsection during the operation of the mold a downward pressure is exerted upon the upper end of the roll-body-forming metal within the chill B. It will be observed that in the construction illustrated, which is essentially well suited for the casting of rolls having long bodies and long necks, the inner cope-casing- I section it does not extend in under the outer cope-casing-seotion K which is arranged over the contracting shell or crust of the rollforming portion of the casting during the operation of the mold, and consequently in the construction illustrated pressure can be exerted downwardly upon the upper end of the roll-body-forming metal during the casting operation between the inner end of the upper neck and the peripheral shell or crust of the roll -body-forming portion of the casting Without exerting pressure downwardly upon the said crust or shell.

The inner cope-casing-section Zr is prefer.-

ably provided at its upper end and internally (see Figs. 1 and 2) with laterally and inv wardly projecting ears k upon which is mounted a ring 0 which is removably secured to the said cars by suitably applied bolts 0 and nuts 0 The ring 0 is shown provided with holes 0' which extend vertically through the ring and are spaced at short intervals circumlcrontially of the ring above the surrounding wall or walls of the copeol'1aml.)er 13.

The surrounding wall of the (illilhCl'lilIIllX-II 12 (see Fig. 1) provided with two vertically spaced holes b which extend laterally through the surrounding wall of the chillchamber 12, being formed in the different chill sections respectively and equidistantly from the inner side of thejflanges B and. B respectively. Preferably each hole 6'' extends laterally from one of the chamberenlargements b of the chill-chamber 12 to the exterior of the chill. The hole 0 in the upper chill-section is closed. by a removable plug b.

The hole 6 formed. in the lower chillsec tion is occupied. by a plug or member as which is shiltable endwise of the said. hole and extends a suitable distance outwardly beyond the exterior of the chill, being operatively connected at its outer end with a suitably supported lever T. The flanges B and B of the chill are each provided with a hole 6 which extends vertically through the said flange and is laterally enlarged at the inner side of the flange, as at I). The holes 11 in the two flanges B and. B are arranged inline endwise. The leverT has a rounded lower end engaging a correspondingly shaped seat formed by the enlargement b of the hole 5 in the flange B It will be observed therefore that the lever T is fulcrumed at its lower end to the chill by the engagement of the rounded lower end of the lever with a corrrespondingly shaped seat formed in the flange B The operative connection between the member 2a and the lever T (see Figs. 1 and 8) comprises a pin a which extends laterally througl'i and is withdrawable' endwise from the said member 06. The pin a extends into the lever T which is slotted longitudinally, as at t, to accommodate the location of the said pin and permit the required actuation of the lever.

The flange K (see Figs. 1 and 6) is provided with a depending arm 20 which is provid-ed with a vertically arranged slot 21, and a plate or bracket 24 is secured to the said arm and consequently rigid with the outer copecasing-section. A bolt 22 extends through the slot 21 and through the bracket 24 and is arranged with its head. at one side of the arm 20, and the bracket 24 is interposed. between the opposite side of said arm and a nut 23 mounted on the bolt. It will be observed therefore that the plate or bracket 24 is adjustable vertically, that upon loosening the nut 23 the said bracket is rendered free to be readjusted, and that the bracket is secured in the desired adjustment by tight ening the said nut.

The plate or bracket 24 is provided at one side with a scale or graduations, as at 25, (see Fig. 1) and the lever T overlaps the said side of the said bracket and terminates at its upper end in a pointer 30 adapted to cooperate with the scale 25 in measuring and indicating the distance which the member as is moved into the adjacent chamber-enlargement 6 of the chill upon swinging the lever T inwardly. The lever T is normally in its outwardly swung position in which the member 90 extends to but does not project into the adjacent chamber-enlargement of the chill, and the lever is locked or held in its outwardly swung and normal position by a pin 27 which (see Fig. 7) extends through a hole formed in the upper end of the lever and .into a hole '29 formed in the bracket 24 and is withdrawable from the said bracket.

A spiral spring 31 (see Fig. 1) is attached at one end to the lower end of the arm and at its other end to the lever T and acts in the direction required to swing the lever in wardly and thereby shift the connected member :10 inwardly into the adjacent chamber-enlargement b when the pin 27 is with drawn from the bracket 24.

The bracket 24 is provided with a lug 26 arranged to form a stop for limiting the actuation of the lever T by the action of the spring 31 in the direction required to move the member a; inwardly, and the arrangement of parts is such that the said member a: shall not be moved inwardly-beyond the adjacent chamber-enlargement b of the chill.

Briefly described the operation of my improved mold is as 'follows: The molten metal employed in casting a roll is introduced at the inlet 16 of the drag-cavity a, filling the said cavity and then rising into and filling the chill-chamber 12 and then rising into and within the cope-chamber 13 until the level of the molten metal Within the cope chamber has risen to the required height. The molten metal introduced into the mold is permitted to stand until it shall have formed a suitable shell or crust whereupon the cope and the suspended drag and with them the casting before formed in the mold are lowered by a proper manipulation of the screws H to maintain or keep the beads or ribs formed externally of the crust or shell within the chamber-enlargements b of the chill in contact with the downwardly and inwardly sloping bottom walls of the said chamber-enlargements until the contraction has progressed far enough. Ob viously the upper of two adjacent ribs or beads formed on the casting will lower somewhat more through vertical contraction during the casting of the roll than the lower of the said beads or ribs and to accommodate this unequal lowering of the said ribs or beads the importance of the gradual in crease in the slopes of the bottom-walls of the chamber-enlargements b toward the upper end of the chill is apparent. If pressure is to be exerted downwardly upon the upper end of the rollbody-forming metal to form a more desirable union between the upper neck and the rollbody, or for other reasons, the inner cope-casing-section and with it the surrounding wall or walls of the cope-chamber 13 are lowered independently of the outer cope-casing-section by a proper manipulation of the screws R and r. As soon as the eripheral crust or shell of the roll-body has fbrmed in the chill the lever T is unlocked by withdrawing the pin 27 from the bracket 24 whereupon the spring 31 actuates the said lever inwardly and causes the member so to enter the adjacent chan'iber-enlargement b as far as the horizontal contraction of the roll-body-forming portion of the casting will permit, and the cooperation of the scale 25 and pointer measures and indicates the distance which the member ac has moved into the adjacent chamber-enlargement and consequently the amount of horizontal contrac= tion of the casting.

The provision of a hole 5 in each of the chill-flanges B and B and the provision of the two plugged holes 6 is important to render the chill reversible end for end.

What I claim is 1. In a roll-casting mold, a stationary vertically arranged chill provided interiorly with a chamber which extends from end to end of the chill and is enlarged diametrically at suitable intervals between the ends of the chill, with the diametrical enlargements of the chamber extending circumferentially of the chill; a suitably supported vertically movable lower mold-part or drag extending into the chill and provided with a cavity which has an inlet and is arranged centrally of and in communication with the aforesaid chillchamber; a suitably supported vertically movable upper mold-part or cope extending into the chill and having'a chamber which is arranged centrally of and communicates with the chill-chamber, and means whereby the drag and cope are shiftable vertically simultaneously while the chill remains stationary.

2. In a roll-casting mold, a stationary upright chill provided interiorly with a chamber which extends'from end to end of the 'chill and is enlarged diametrically at suitable owered and provided with a cavity which has an inlet and is arranged centrally of and in communication with the aforesaid chillchamber; a suitably supported upper moldpart or cope depending into the chill and adapted to be lowered and having a chamber which is arranged centrally of and communicates with the chill-chamber, and means whereby the drag and cope may be simultaneously lowered while the chill remains stationary.

tically arranged chill provided interiorly with 3. In a roll-castingmold, a stationary upright annular chill having its interior chamber enlarged diametrically at suitable intervals between the ends of the chill, with the diametrical enlargements of the chamber extending circumferentially of the chill and having suitably sloping bottom" walls; a suitably supported upper mold-part or cope arranged to engage and be lowered into the upper end of the chill-chamber; a lower mold-part or drag, and such an operative connection between the drag and the cope as to render the cope and drag vertically shiftable simultaneously and independently of the chill.

4. In a roll-casting mold, a stationary vertically arranged chill provided interiorly with a chamber which extends from end to end of the chill; a suitably supported vertically movable mold-part or cope arranged to engage and be lowered within the upper end and independently of the chill, and a lower moldpart or drag suspended from the cope so that the drag is shiftable simultaneously with the cope. f

5. In a roll-casting mold, a stationary vertically arranged chill provided interiorly with a chamber which extends from end to. end of the chill; a suitably supported vertically shiftable upper mold-part or cope arranged to engage and be bodily lowered within the upperend and independently of' the chill, said cope comprising a casing provided externally with a laterally and outwardly projecting flange extending circumferentially of the cope, and a lower mold-part or drag suspended from the said flange.

6. In a roll-casting mold, a stationary vera chamber which extends from end to end of the chill; suitably supported blocks spaced circumferentially of the chill and provided with screw-threaded holes extending vertically through the blocks; correspondingly externally threaded screws engaging the said holes a lower moldart or drag provided with a cavity which has an inlet and is arranged centrally of the lower end of and in communication with the chamber in the chill; an upper mold-part or cope arranged and adapted to be lowered and provided with a chamber which is arranged centrally of the upper end of and in communication with the chill-chamber, said cope comprising a casing which is supported from the aforesaid screws, and rods supported from the cope-casing and connected at their lower ends with and sup porting the drag,

. 7. In a roll-casting mold, a stationary vertically arranged chill having an interior chamber which extends from end to end of the chill; blocks borne by and spaced circumferentially of the chill and provided with screw-threaded holes extending vertically through the blocks; correspondingly thread- I ed screws engaging the said holes and provided centrally with holes extending vertically through the screws; a lower mold-part or drag provided with a cavity which has an inlet and is arranged. in communication with the chill-chamber, an upper mold-part or cope arranged. and adapted to be lowered and. provided with a chamber which is arranged at the upper end of and in coniniunicatron with the chill chamber, said cope being borne by the aforesaid screws, and rods extending through. the holes in the said screws and supporting the drag, which rods are supported at their upper ends from the cope.

8. In a roll-casting mold, a stationaryven tically arranged chill provided. interiorly with a chamber which extends from end to end of the chill blocks borne by and arranged externally of the chill, said blocks being spaced circumferentially of the chill and provided with screw-threaded holes extending verti cally through the blocks; correspondingly externally threaded screws engaging the said holes and provided centrally with holes extending vertically therethrough; a lower mold-part or drag; an upper mold-part or cope arranged and adapted to be lowered and comprising a casing which is provided externally and above the aforesaid screws with a laterally projecting flange which overhangs and is supported from the screws, and rods supported from the cope-casing and connected at their lower ends with and supporting the drag.

9. In a roll-casting mold, a stationary vertically arranged chill provided interiorly with a chamber which extends from end to end of the chill; suitably supported blocks spaced circumferentially of the chill, and provided with screw-threaded holes extending vertically through the blocks; correspondingly externally threaded screws engaging the said holes and provided centrally with holes extending vertically through the screws; a lower mold-part or drag; a vertically movable upper mold-part or cope depending into the chill-chamber and comprising a casing which is provided externally and above the screws with a laterally projecting annular flange which overhangs the screws; rods having screw-threaded upper ends and extending loosely through the flange and loosely through the holes in the screws, which rods are connected at their lower ends with and support the drag nuts mounted on the rods above the flange; washers interposed between the nuts and the flange, and washers interposed between the flange and the screws.

10. In a roll-casting mold, a stationary vertically arranged chill provided interiorly with a chamber which extends from end to end of the chill; blocks supported from and arranged externally of the chill and having surfaces engaging and conforming to the exterior of the adjacent portions of the chill,

which blocks are provided with screw-threaded holes extending vertically therethrough; correspondingly externally threaded screws engaging the said holes; a lower mold-part or 'aloresaid screws: rods having screw-threaded.

lower ends and supported from the cope-casing, which rods extend. loosely through the aforesaid flange, and nuts mounted on the rods under the said flange and supporting the drag-casing.

11. In a roll-casting mold, a stationary vertically arranged chill having an interior chamber which extends from end to end of the chill, said chill being provided at its upper end and externally with seats spaced circumferentially of the chill; blocks mounted on. and removable from the seats, which blocks are provided with screw-threaded holes extending vertically through the blocks; corrcspoi'idingly externally threaded screws engaging the said holes; a lower mold-part or drag ;an upper mold-part or cope borne by the aforesaid screws, and means whereby the drag is suspended from and movable with the cope.

12. In a roll-casting mold, a stationary vertically arranged chill having an interior chamber which extends from end to end of the chill, said chill being provided externally with seats spaced circumferentially of the chill, which blocks are removably mounted on the said seats and provided with screw-threaded holes extending vertically through the blocks; correspondingly externally threaded screws engaging the said holes; means whereby lateral displacement of the blocks is prevented; an upper mold-part or cope borne by the aforesaid screws, and a lower mold-p art or drag operatively connected with the cone.

13. n a roll-casting mold, a stationary vertically arranged chill having an interior chamber which extends from end to end of the chill; a lower mold-part or drag; an upper mold-part or cope; vertically adjustable bearings spaced circumferentially of the mold and supporting the cope, and means whereby the drag is suspended from and movable with the cope.

14. In a roll-casting mold, a stationary vertically arranged chill having an interior chamber which extends from end to end of the chill; a suitably supported lower moldpart or cope having a cavity which is ar ranged centrally of the lower end of and in communication with the chamber in the chill; an upper mold-part or cope provided with a chamber which is arranged centrally of the upper end of and in communication with the chilLehaInber, said cope comprising a casing consisting of a suitably supported outer section and an inner section having lateral bearings within and slidable endwise of the outer section, with the outer cope-casil'ig-scction provided at its upper end. and externally with an annular flange, with. the inner copc-casing-section interiorly lined with material forming the surrounding wall or walls of the cope-chamber and provided at its upper end and externally with an annular flange overlapping the aforesaid flange oi the outer cope-casing-section screws screwed from below through the flange of the outer cope-casing-section into engagement with the under side of the flange on the inner cope-casing section, and screws extending through the flange of the inner copecasin --section and screwed into the outer cope-easing-section and arranged with their heads in position to bear downwardly upon the upper end of the inner cope-casing-sec tion.

15. In a roll-casting mold, a stationary vertically arranged chill having an interior chamber which extends from end to end of the chill; a suitably supported lower moldpart or drag having a cavity which is arranged centrally of the lower end of and in communication with the chamber in the chill; an upper mold-partor cope provided. with a chamber which is arranged centrally of the up er end of and in communication with the c ill-chamber, said cope comprising a casing consisting of a suitably supported outer section and an inner section having lateral bearing within and adapted to be lowered independently of the outer section, with the inner cope-casing-section lined interiorly with material forming the surrounding wall or walls of the cope-chamber and supported at its upper end from the outer cope-casingsection.

16. In a roll-casting mold, a stationary vertically arranged chill having an interior chamber which extends from end to end of the chill; an upper moldpart or cope provided with a chamber which is arranged centrally of the upper end of and in communica tion with the chill-chamber, said cope comprising a casing consisting of an outer section and an inner section havin lateral bearing within and adapted to be owered independently of the outer section, with the outer cope-casing-section supported as required to render it capable of being lowered, with the inner cope-casing-section lined in teriorly with material forming the surround ing wall or walls of the co e-chamber and supported at its upper end iiom the outer copecasingsection, and a lower mold-part or drag supported from and movable with the outer cope-casing-section and provided with a cavity which has an inlet and is arranged centrally of the lower end of and in communication with the chill-chamber.

17. In a roll-casting mold, a stationary vertically arranged chill having an interior cliiainber which extends from end. to end oi the chill; an upper mold-part or cope provided with a chamber which is arranged centrally of the upper el'id of and. in communication with the chill-chamber, said cope com- 'prising a casing consisting oi' an outer section and an inner section having lateral hearing within and adapted to be lowered independently ol' the outer section, with the outer cope-crising-section supported as required to rend or it capable of being lowered, with the inner cope -casing-srwtion lined interiorly with material lormii'lg the surrouruling wall or walls of the cope-chamber and supported at its upper end from the outer cope-casingsection; a lower moldpart or drag having a cavity arranged centrally oi the lower end of and in communication with the chillchamber, and upright rods arranged externally and spaced circum'ferentially of the chill, which rods support the drag and depend and are supported from the outer cope-casing-section.

18. In a roll-casting mold, a vertically arranged chill which has an interior chamber extending from end to end of the chill and is provided at its lower end. and externally with an annular flange; stationary supports eX- tending under and atlording bearing to the said flange and spaced circumferentially of the lower end of the chill; a suitably supported vertically movable upper mold-part or cope, and a lower mold-part or drag adapted to be lowered and supported from and movable with the cope.

19. In a roll-casting mold, a vertically arranged chill which has an interior chamber extending from end to end of the chill; stationary supports wl'iich bear the chill and are spaced circumterentially of the lower end of the chill; a suitably supported vertically shiftable upper mold part or cope, and a lower mold-part or drag adapted to be lowered and being supported from and movable with the cope, said drag projecting upwardly into the chill-chamber and comprising a casing which is provided at its upper end and externally with an annular flange which has recesses engaged by the aforesaid chillsupports.

20. Ina rollcastingmold, astationary vertically arranged chill which has an interior chamber extending from end to end of the chill; a suitably supported vertically shiftable upper m0ld-part or cope, and a lower mold-part or drag suspended from the cope and comprising a casing which is provided interiorly with an annular flange which tcrminates in. an annular member which projects upwardly into the chill and is instrumental in the maintenance of a suitable joint between the drag and the chill. during the lowering of the cope and drag.

21. In a roll-casting mold, a suitably supported vertically arranged chill having an interior chamber which extends from end to end of the chill; an upper mold-part or cope provided with a chamber which is arranged centrally Oil the u pcr end of and in communication with the chill-chamber, said cope comprising a casing coi'isisting of a suitably supported outer section and an inner section which is arranged. within and supportedv as required to render it capable of being lowcred independently of the outer section, with the said inner cope-casirig-section lined. interiorly with material forming the surrounding wall or walls of the cope-chamber, and a suitably supported lower mold-part or drag provided with a cavity which has an inlet and is arranged centrally of the lower end of and in communication with the chillchamber.

22. In a roll-casting mold, a suitably supported vertically arranged chill having an interior chamber which extends from end to end of the chill; an upper mold-part or cope provided with a chamber which isarranged centrally of the upper end. of and in communication with the chill-chaniber, said cope comprising a casing consisting of an outer section supported as required to render it capable of being lowered, and an inner sec tion which is arranged within and supported as required to render it capable of being lowcred independently of the outer section, with the said inner cope-casing-scct1on lined interiorly with. material forming the surrounding wall or walls of the cope-chamber, and a suitably supported lower mold-part or drag provided with a cavity which has an inlet and is arranged centrally of the lower end of and in communication with the chill-chamber.

23. In a roll-casting mold, a suitably supportcd vertically arranged chill having an interior chamber which extends from end to end of the chill; an upper mold-part or cope provided with a chamber which is arranged centrally of the upper end of and 111 communication with the chillchamber, said cope comprising a casing consisting of an outer section and an inner section which. is arranged within and supported as required to render it capable of being lowered independently of the outer section, with the said inner copecasing-section lined interiorly with material forming the surrounding wall or walls ofthe cope-chamber, and with the outer cope-casing-section supported as required to render it capable of being lowered, and a lower mold part or drag provided with a cavity which has an inlet and is arranged centrally of the lower end of and in communication with the chill-chamber, said drag being supported as required to render it capable of being lowcred.

24. In a roll-casting mold, a suitably supported upright chill which has an interior chamber extending from end to end of the ICC chill; an upper mold-part or cope arranged and supported as required to render it capable of being bodily lowered within the upper end and independently of the chill, and a lower mold-part or drag arranged at the lower end of the chill and supported as required to render it capable of being bodily lowered independently of the chill.

25. In a roll-casting mold, a suitably supported upright chill which has an interior chamber extending from end to end of the chill; an upper mold-part or cope arranged and supported. as required to render it capable of being lowered within the upper end of the chill, and a downwardly movable lower 15 mold-part or drag arranged at the lower end of the chill, and means whereby the dra is suspended externally of the chill-charnier from the cope so as to render the drag movable Vertically with the cope While the chill 20 is held stationary.

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

RALPH H. WEST.

Witnesses:

C. H. Donna, B. 0. BROWN.

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