US698592A - Mold mechanism. - Google Patents

Description

No. 699,592. Patented Apr. 29, :992.

c. H. vEEDEn.

MOLD .MECHANISM (Appxication med my 19, 1900.;

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Nu. 698,592. Patented Apr. 29, |902.

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MOLD MECHANISM.

(Application led May 19, 1900.) l(No Model.) v 3 SheeisSheei 2.

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.By fezlr .filer/wey,

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Patented Apr. 29, `|902. `c. H. vEEuER. Y

' MOLD MECHANISM.

(Applicstiox Bled my 19, 1900.)

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(No Model.)

Witnesses:

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5o trated an improved organization of devices useful Improvementsin Mold Mechanism, of

UNITED STATES.`

PATENT EOEEICE.

CURTIS I'I. VEEDER, OF HARTFORD, CONNECTICUT.

MOLD MECHANISM.

SPECIFICATION forming part of Letters Patent No. 698,592, dated April 29, 1902.

i Application led May 19, 1900. Serial No. 147,42I9-. `(No model.)

.To all whom t 771,603/ concern: l A

Be it known that I, CURTIS H. VEEDER,`a

citizen of the United States, residing in Hartford, in the county of Hartford and State of Connecticut, have invented certain new andi which the following is a specification.

This invention relates principally to mold mechanism; and it has for one of its main objects the provision of an improved separable mold in which articles may be shaped into form, and especially a mold in which castings may be formed from molten metal delivered into the mold under high pressure. As to this feature thereof the present invention is in the nature ofan improvementupontheinventions shown, described, and claimed in my prior ap-w plications, SerialNo. 2,435, filed January 23, 1900, and Serial No. 5,296, filed February l5, 1900, in Which I have shown mold mechanism embodying separable molds, in the former of which cases the sections of the mold are movable differentiallyin the same direction, Whilein the latter of said cases the mold has a pair of side sections capable of movement in different and opposite directions.

The mold mechanism illustrated in the present case is distinguished from t-he corresponding mechanisms shown in my prior applications in that it embodies not only a pair of side sections movable in different and opposite directions, but also an additional side section movable in the `path of one of the iirst-mentioned pair. Preferablyithere Will be not only a first pair of side sections or main mold-sections, but also an additional pair of side sections or auxiliary mold-sections, the auxiliary side sections being movable in this case one in the path of Aone of the main sections and the other in the path of the other main section. `Usually each main mold-section will have an auxiliary core-section cooperative therewith,and When properly operated each core-section may bestripped from the casting before its main section operates. Any means that is suitable for the purpose may of course be employed for operating such main and auxiliary sections relatively to each other; but here I have illusfor this purpose,and such operating means constitutes another important feature of the invention.

Inmy prior applications hereinbefore mentioned I have illustrated mold mechanisms in which the several sections of the mold when in their closed positions are lield in place by 'spring-pressure; but in said constructions each such section is heldin place by a spring located at a distance from the mold, and there has been no direct coaction between two parts of the mold, one mounted on the other and one a main and the other an auxiliary member,- havinga spring interposed between them for operating one of said parts. In the present mold mechanism the main mold-section, with its carrier, incloses the auxiliary mold- 'section and its carrier, and a spring is interposed between the parts in such a manner that there is a direct coaction between these parts, and one of the movements of said main section is controlled directly by suchspring. This, however, is not the only feature of difference between the mold mechanisms illus- J,trated in said prior applications and that shown herein, as in this case the springs controlling the main and auxiliary casting-forming sections coact with one another and are so controlled that one of them when put under tension operates to tension the other also,A

to its support, said Scrapers being movable in this case toward each other While the sprue-forming mold-sections are opening.

" In the drawings accompanying this speciiication and forming part of the present application, Figure l is a substantially central vertical longitudinal section of a casting- Inachine embodying mold Ymechanism and mold-scraping means constructed in accord- IOO ance with my present invention. Fig. 2 is n enlarged sectional plan of said mold mechnism and scrapers with their operating means, and Fig. 3 is a front elevation of the same. Fig. 4f is a section taken on a plane transverse to the plane of Fig. 2 and through the center of the mold, the latter being shown open. Fig. 5 is a similar section through a pair of guide-pins extending from one moldsection and fitted to slide through openings in the other section. o

Similar characters designate like parts in the different figures of the drawings.

My improved mold mechanism and moldscraping means are embodied in the construction shown herein ina complete automatic casting-machine by means of which castings may be formed and ejected from the machine regularly and at a high rate of speed without requiring any considerable amount of attention from an operator.

The several operative part-s of the machine may be mounted on a suitable framework or bed, such as A, supported on legs in the usual manner and having a main shaftA 2,.'which may be driven by a band-wheel 3 from any suitable source of power, and from this shaft the movements of all of the automaticallyoperating parts of the machine may be derived.

The metal to be supplied to the mold may be contained in a melting-pot, such as M, at one end of the framework, the contents of this pot being kept hot in any suitable manner, ordinarily by a gas-jet. In the construe.- tionshown this melting-pot has a well 6, opening directly in to a chamber 8, having an inlet-opening 8' and an outlet-opening l0, The chamber 8 and the lower part of thewell 6 are kept filled by metal entering the opening 8', while the upper part of the well is filled by metalentering through an opening 6. This chamber 8 in the present case is formed partly ,within and partly without the melting-pot M and has a nozzle l2, which contains' a portion of the valve-chamber S and also contains the d ischarge-openingfli).

Molten metal may 'be forced into the mold Aby means of a plunger, such as 1J, working inthe well 6, which latter may have a remov-v into the valve-chamber 8, maybe formed in an annular seat or bushing 5, which may be removable fromI the melting-pot. Here the melting-pot is divided into two main parts, one beingtlie melting-,tank proper, while the other includes the well and the valve-chamber just described. All of the parts of the melting-pot may be surrounded by a casing, such as 1 3, in order that the heat may be utilized` to the best advantage.

For the purpose of controlling the flow of molten metal to the mold I prefer to employ a valve, such as fr, so constructed as to close the opening l0 whena casting is notbeing made. This valve may also serve to open communication through the passage 8 with the main body of metal in the melting-tank and when so constructed as to accomplish Vboth of these results constitutesa double-acand in turn is pivoted to the upper end of a lever 3l', suitably pvotedon the framework and having a block with a let-off face 3l, adapted to coact with a corresponding quicklet-0E face of a cam 33 on the shaft 2. Said lever has secured thereto one end of a coiledV spring 32, the other end of which is fastened to a fixed point and serves to force the plunger p down rapidly when the let-off face 3lH rides down that of the cam 33.

The valve n is intended to reciprocate in the chamber S andin the openings 8 andlO and during a portion of acomplete cycle of operations will be controlled in its movements by the molten metal in the valvechamber and in the main portion of the melting-pot M and will move back and forth in.

accordance with the iiow of the metal in the one direction or the other; but during an-` other portion of the cycle of operations it isl vintended that the valve shall be held positively shut. that the valvewilly close the opening 8. imymediately after the plunger p begins to de- The parts may be soy organized scend and will open thek passage l0 to permit IOO the molten metal to enter the, mold, wherei upon the valve 'u should be shifted immediately to close said passage and shut off the iiow of metal therefrom.

The operati-ng connections to thevalve c comprise in thisv case a rock-arm 35,-a rockshaft 35, to which said rock-arm is secured, a rock-arm 35, and a connecting-rodBG, pivoted to the lower end of said rock-arm 35 and also pivoted near the opposite end of the machine to the upper end of a lever 37, having an antifriction-roll 37 cooperating with a cam l-l on the shaft 2, said cam having a small wiper 4lprojecting therefrom for shifting the rock-arm 35 away from the valve momentarily when a castingv is to be made. A suitable spring 3d', connected to the rod 3b' :and to a fixed point, may serve to hold the antifriction-roll 37 in contact with the cam 4l and to operate said rock-arm quickly to close the valve o and cnt off the supply of metal to the mold.

An important feature of my present invention is theemployment in connection with moldlllin g means of a separable mold having sprue-forming and casting-forming side sections capable of movement in different direc- IIO tions, so as to open or close the mold andfacilitate the stripping of the sprue and the main portion of the casting from the mold when the latter is opened. In practice the walls of the sprue-hole become roughened and coated at the point where the metal first enters, and it is very difficult to withdraw the sprue from a solid mold at this point. Hence I prefer to make use of a mold embodying a pair of side sections in which the sprue will be formed and which may be separated to strip the sprue fromsuch sections. I also make use of casting-forming side sections in connection with such sprue-forming sections, and in the present construction the mold is divided into`twomain parts, each of which is a combined sprue-forming and castingforming section.

Many diiferent" styles of molds may be employed which will embody my present invention, provided that the molds differ only in the shapes of the mold-spaces; but in the present case I have illustrated a mold embodying a pair of main sections and a pair of auxiliary sections, each of the main sections constituting a combined-,sprue-forming and casting-forming mold-section. The mold is designated in a general way by O, and the main sections thereof are designated, respectively, by o and o'. These main sections are combined sprue-forming and casting-forming sections and `may be in two or more parts, the main portion 'of each mold-section `ordie containing in this ease the sprue-forming channel, such as 17 or 17', while the moldspace proper is formed in a separate mold` section ordie, such as 20 or 20'. A die constitutes, therefore, a mold-section, and if the mold-sections `are made in the form of removable dies it will be evidentthat the removable mold-sectionsor dies 2O and 20' may" be removed and other sections havingsimi-` lar exteriors, but dissimilar mold-spaces, substituted in order to permit the formation of a casting of a different shape.

It will be noticed that the sprue-opening formed by the sprue-channels in the respective mold-sections o and `o' is a substantially circular one surrounding the mold-space for the body of the casting and thatthis circular sprue-opening` has extendingfrom opposite sides thereof alined channels, the result being that when molten `metal is injected into the mold there will be formed a casting having a sprue surrounding the same, with alined arms projecting from opposite sides thereof. One end of this sprue-,opening-viz. that through which the metal enters `the moldwill of course connect with the opening 10 of'the mold-filling means, While the other straight portionof the sprue-opening, which is designated by 17", is intended to be kclosed by a casting-centering device, such as the pin 22, itbeing evident that `byzprovidinga support which is clear ot' the dies the mold-sections may be separated from the casting while the latter is supported atsome fixed point, and thus a very perfect stripping action may be securedand the release of every section from the casting assured. This pin 22 is carried in the present case by a block 23, which may be adjusted laterally by means of screws, such as 24, for the purpose of alining said centering device or pin with the opening 10, while adjusting and holding I screws, such as 25, may be employed for the purpose of locating said pin in the opposite direction by shifting it toward or from the discharge-openinglO. Inorderthatthe moldsections o and o' may be located accurately lengthwise thereof, I prefer to guide them positively as they approach or recede from each other, and iuthis case the mold-section `o has guide-pins 19 projecting transversely therefrom and passing through correspond ing guide-openings in the section o'.

In addition to the main sprue-forming or casting-forming mold-sections I have illustrated herein a pair of auxiliary sections, which are inthe nature of core-sections and are designated herein by o" and 0', and each of them works in a central longitudinal i opening or bore in its corresponding main casting-forming section, such as the bushing or die 20 or 20'. 1`

All of the sections of the mold may be supported by movablemold-carriers, eacl1`moldlsection in this case having a separate` carrier on which it is supported and by means of which its movement-s are controlled. Preferably the entire mold will be mounted on a 1 mold-carriage movable toward `and from the discharge-opening 10, and hence in this case `said carriage will move horizontally. This mold-carriage is designated in a general Way by H and is movable in parallel guideways, j such as 18,0n the framework. Saidcarriage supports the block 23 and the centering-pin 22 and' also has in this case guideways in which the mold-carriers may be mounted for reciprocation. `Of course this carriage may be made up of a number of parts, and, in fact, it has been found advantageous to mount the mold-carriers in guideways in di-` j vided collars or bearings, such as 16 and 16'.

The combined sprue-forming and casting- Icr 5 j, forming sections o and o" may be supported" by cylindrical mold-carriers mounted for reciprocation on the main slide orcarriage,crfoss` wise of the latter'. @ne of the other" mold- "ca1riers, such ash", supports, inthis case` the y core-section o", while the othercarrier, h",

supports the core-section 0"', said` mold-c ar-` y riers being preferably tubular and thefcore` sections being secured thereto, infthis case by suitable screws, such as 15 and 15'.

Each- `of themold-carriersh" and h'" is inH this con-` struction of three" diameters, that. portion which isof largest diamete'rbeing Asupported in the openings of the divided collars 1.6 and 16', whilethe portion which is of medium diameter is intended to receive the mold-,car- 'riers for thecorrespondingcombined sprue` forming and castinglforming mold-section.

In this case the mold-section o (including the section 20) is secured, to a mold-carrier in the form-of a sleeve h, mounted on the mold-carrier h" and having a key 45, adapted to work in a key-slot 46 in said mold-carrier h" and in a corresponding key-slot 47 in the collar 16, while the mold-section o' (including the moldsection 20') is secured to a mold-carrier in the form of a sleeve h', mounted on the mold-carrier h'" and having a similar key 45', working in a key-slot 46' in the mold-carrier h'" and in a key-slot 48 in the collar 16'. The manner in which the carriers h and h' are operated will hereinafter appear.

The mold-carriage II and the mold-carriers h" and t'" may be operated in any suitable manner; but I prefer to actuate them by means of direct mechanical connections from the shaft 2. In the construction shown said mold-carriage has secured thereto a rod 50, carrying a pair of stops 50' and 50", and also a sleeve 51', which is swiveled to the upper end of a lever 5l, pivoted at a suitable fixed point and having an antifriction-roll 51", which coperates With acam 56, secured to the shaft 2. The connection between the rod 50 and the lever 51 is a yielding one, and in this case a spring 52 is interposed between the stop 50' and the sleeve 5l', it being evident that said spring will serve to hold the mold firmly against the discharge -nozzle of the mold-filling means when the carriage is in its forward position. The mold-carriers 7L" and h'" may be operated by substantially similar connections from the shaft 2. Here anglelevers, such as 57 and 57', are pivoted at suitable ixed points and connected to said respective mold-carriers by means of links 58 and 58', the other arms of the angle-levers being adjustably pivoted in this case to a pair of adjustable connecting-rods, such as 59, these connecting-rods being pivoted at their rear ends to a pair of levers, such as 60, by connections of substantially the same type as the connection between the rod 50 and the lever 51-that is to say, sleeves, such as 60',

are mounted on the rods 59 and are swiveled/ to the levers 60, while springs, such as 61, interposed between said sleeves and a pair of stops, such as 59", may serve to hold the coresections o" and 0"' tightly together. Stops, such as 59', may limit the movements of the sleeves 60' in the opposite direction. The levers 60 have antifriction-rolls, such as 60",`

which coperate with cams, such as 63 and 63', secured to the main shaft, said cams being so positioned that cam 63.will permit'the mold-sections o" and o to withdraw from the casting before the sections 0"' and o' begin to move. It will be understood that the le- 51" in contact with their cams, I may make use of-a spring, such as 65, connecting the lever. 51 with one of the levers or rock-arms 60. The devices for operating the mold-carriers h" and 71"' have just been described. For the purpose of operating the mold-carriers h and h' I make use of these devices and also of a pair of springs for shifting the carriers h and h' relatively to the carriers h" and h'", on which they are mounted. In this case these springs are designated by 66 and 66' and are interposed between the outer ends of the moldsections 2O and 20' and the ends of those portions of the carriers h" and h'" which are of medium diameter. By so organizing the parts not only will these springs be inclosed, but they will cooperate directly and most effectively with the parts which they are intended to operate, and while the latter will be actuated principally by the connections for operating the carriers h" and h'" said carriers 7L and h will also have additional movements relative to those of the carriers h" and 71"', and these additional movements will be controlled by said springs. The parts are so organized that the springs 66 and 66' tend to force the carriers h" and h'" outward to strip the core-sections from the casting before the main sections of the mold begin to move. Some means for scraping off the metal which adheres to the mold is an important element of a casting-machine of this type, especially for scraping those cheeks which come in contact with the discharge-nozzle of the mold-filling means, as metal sometimes adheres very lirmly to these faces of the mold. In order to remove this metal and assure a tight joint and p revent clogging of the mech` anism, I prefer to employ one or more scrapers movable relatively to the moldor the moldilling means for scraping a cheek or cheeks of such part. Usually I will employ a scraper or scrapers movable with and relatively to the mold, and in the present case I have,

shown a pair of scrapers, such as 70 and 70', mounted, respectively, on the collars 16 and 16' and suitably held in place thereon, so as to be capable of sliding relatively thereto. In this case said scrapers are slotted, as shown at 71 and 71', and are guided by the smooth shanks or screws, such ,as 72 and 72', two of which are secured to each collar or bearing. Said scrapers may be operated by means of links, such as 73 and 73', connected to short levers, such as 74 and 74', which in turn are connected by links 75 and 75' to the angle-1evers 57 and 57'. By means of these connections each mold-section is moved inward toward the line of separation of the mold-section, while the corresponding mold-carrier, with which the scraper coacts, is moved away from such line of separation to open the mold, and hence as the mold-sections separate the scrapers move towardeach other and across the cheeks of the sprue-forming mold-sections. l

It should be noted here that while the cenlOO los

Ito' tering-pin 22 cooperates with the mold-sections to support the casting and release the same from said sections this pin does not fit tightly in thefmold. Hence a small opening is left around the end of the pin, through which opening any air and gas left in the mold after the closing of the sections will escape, together with a portion of the molten metal, which will form around the tapering point of the centering-pin a fin that will oppose sufficient 'resistance to the pull of the last mold-section to befseparated to assure the release of the casting from the latter.

The operation of a machine embodying mold mechanism and Scrapers constructed and organized in the manner hereinbefore stated is as follows: The parts being in the `positions shown in the drawings, with `the mold closed and the band-wheel 3 turning in the direction of the arrow, the let-off face 31 of the lever 3l willifirst ride down the corresponding let-off face of theV cam 33 and the plunger will begin to descend under the influence of the spring 32. Immediately thereafter the nose 41 of the cam 4l will shift the lever 37 to the left, and the rock-arm 35 will be shifted away from the valve u to permit the latter to open, the pressure in the valve-chamber 8 being sufficient to accomplish this result. The continued descent of the plunger p will thereupon force a stream of molten metal into the mold to fill the latter, whereupon the nose 41 will move away from the `roll 37 and the spring 65 will operate the rock-arm 85 to close the valve o again. Thereafter the spring 65 will become effective to withdraw the carriage H from the nozzle 12 as the antifriction-roll 5l on the lever 5l rides down the ca-m` 56. On the withdrawal of the sprue from the discharge-opening lO the spring 65 will' become .effective to shift the levers 60 to the left successively as the antifriction-rolls 60 ride down the cams 63 and 63. The carrier h" will first withdraw the core-section o from the casting owing to the expansion of the spring 66, and as soon as the inner end wall of the key-slot 46 strikes the key 45 the latter will withdraw from the stop-face 47 and the carriers h and 71, will movetogethertowardthe stop-face47. After the stripping of the mold-section 20 from the casting the cam 63 permits the carrier hf to withdraw the core 0', and when the inner end wall of the key-slot 46 strikes the key 45' the latter will withdraw from the stopface 48" and the carriers hl and 71 will move together toward the stop-face 48', this movement serving to strip the section 20' from the casting, which after the stripping of the section 20 will fall away from the centering-pin 22. As the carriers h and t'" move away from `each other of course the scrapers and 70 will move toward each other and scrape the cheeks of the sprue-forming sections of the mold'. i After the 'closing of the valve the plunger p will rise gradually until it reaches the limit of its upward movement.

The carriage will begin to move forward again after the stripping of the casting has been completed, and will continue its movement until it reaches its extreme forward position. The cams 63 and 63' will also shift the levers 60 and the connecting-rods 59 to the rear and the carriers h and h'" will be moved toward each other again, carrying with them the main sections of the mold. Each main section o or o will be stopped by the striking of its key 45 or 4:5 against the corresponding stop-face 4:7 or 48", and the respective carriers h and h" will continue their movements toward each other and put the springs 66 and 66 undel` compression again, said carriers h and t" being stopped when the outer walls of the l,key-slots therein strike their respective keys, when the core-sections o and 0" will be in contact. During the advance (lll of these mold-sections toward each other of course the scrapers70 and '70' will withdraw from the cheeks of the mold-sections and move away from each other.

Having described my invention, I claim- 1. 'In a casting-machine, the combination with a separable mold, embodying a pair of main dies movablein different directions,and an auxiliary die movable relatively to and in the path of one of said main dies, of a drivingshaft and cam-face actuators operable therefrom, and operatively connected with the dies whereby the main dies and the auxiliary die are caused to move in proper sequence during the running of the machine.

2. The combination, with a separable mold embodying a pair of main dies movable in different directions aud a pair of auxiliary dies movable relatively to and in the p'aths of said main dies, of mold-filling means and means for shifting first one of said auxiliary dies and then the corresponding main die, and afterward the other auxiliary die and its corresponding main die.

3. In a casting-machine,the combination with a separable and shiftable moldembody- 'ing a pair of -main casting-forming dies movable in different directions and also embody ing an auxiliary die movable relatively to one of said main dies, of mold-filling means for supplying molten metal to the mold, a carriage movable toward and from the mold-lilling means, a pair of main die-carriers mounted on and movable relatively to said carriage and respectively supporting said main dies, an auxiliary die-carrier assembled with one of said main die-carriers and supporting the auxiliary die, a driving-shaft, and cam-face actuators operable therefrom for actuating the mold-carriage to advance the same to its casting position and withdraw it therefrom, and independent cam-face actuators for actuating said die-carriers when said carriage hasbeen withdrawn from its casting position `and thereby separate the main casting-forming dies and withdraw the auxiliary die.

` 4; A separable moldiembodying aipair of complementary sprue-forming dies at least IOO IIO

IZO

one oi.' which has a sprite-forming opening therein, said dies also having registering diereceiving openings therein and complementary casting-forming dies seated respectively in said openings, atleast one of said castingforming dies having a die-space therein, and automatic mechanism for opening said mold by withdrawing first one casting-forming die, then its companion sprue-forming die, and afterward the other casting-forming die, and finally the other sprite-forming die.

5. In a casting-machine, the combination with a separable mold, embodying a pair oi main dies and an auxiliary die carried-by one of said main dies and movable relatively thereto, of a spring and stop-faces for controlling the relative movements of said auxiliary die and the main die upon which it is carried, a driving-shaft, and Cain-face actuators operable therefrom for shifting the position of the auxiliary die and thereby effect the movement of the main die by which the auxiliary die is carried.

6. In a casting-machine, the combination with a separable mold, embodying a pair of complementary main dies and a pair of auxiliary dies assembled respectively Vwith said main dies, of main and auxiliary die-carriers for said dies, each pair of die-carriers being movable relatively to each other, springs and stop-faces for controlling the relative movement of the respective pairs of main die-carriers and auxiliary die-carriers, a drivingshaft and cam-face actuators operable therefrom for positively actuating the auxiliary die-carriers.

7. The combination, with a separable mold embodyinga pair of complementary main dies and a pair of auxiliary dies carried respectively by said main dies, of main and auxiliary die carriers for said respective dies; spring-pressed means for automatically operating corresponding die-carriers; each main die-carrier and its auxiliary die-carrier also having a spring interposed between them.

8. In a casting-machine, the combination, With a mold-illing means having a dischargeopening, of a casting-support separate from the mold and located Wholly Without the moldspace and disposed in Ithe meeting line of the dies; a separable mold embodying a pair of side dies having a mold-space communicating with said discharge-opening and closable by said support; and means for separating said dies by armovement transverse to such cast- Y ing-support.

9. In a casting-machine, the combination, with mold-filling means having a dischargeopening, of a casting-support opposite said discharge-opening and located Wholly without the mold-space and disposed in the meeting line of the dies; a separable mold embodying a pair of side dies having a mold-space communicating with said discharge-opening and closed by said support; and-means for separating said dies by a movement transverse to such casting-support.

10. In a casting-machine, the combination, with mold-filling means having a dischargeopening at one end of the sprite-opening, of a support at the other end of the sprue-opening and located wholly without the mold-space;

a separable mold embodying a pair of sprueforming side dies having sprue-channels one communicating with said discharge-opening and the other closable by said support; and means for separating said dies while the casting is sustained by said support.

l1. In a casting-machine, the combination, with mold-filling means having a dischargeopening at one end ofthe sprue-opening, of a pin at the otherV end of the sprue-opening; a separable mold embodying a pair of spruefo-rming side dies having sprue-channels one communicating with said discharge-opening and the other closable by said pin; and means for separating said dies while the casting is sustained by said pin.

12. In a casting-machine, the combination, with mold-filling means having a dischargeopening at one end of the sprue-opening, of an adjustable pin at the other end of the sprueopening; a separable mold embodying a pair ofsprue-formingside dies havingsprue-channels one communicating with said dischargeopening and the other closable by said pin; and means for separating said dies while the casting is sustained by said pin.`

13. In a casting-machine, the combination, with mold-filling means having a dischargeopening at one end of the sprue-opening, of a centering-pin adjustable transversely to, and into alinement with, said discharge-opening and located at the other end of the sprueopening; a separable mold embodying a pair of sprue-forming side dies having sprue-channels communicating with opposite sides of the mold-space, one communicating With said discharge-opening and the other closable by said centering-pin; and means for separating said dies while the casting is sustained by said centering-pin.

14E. In a casting-machine, the combination, with mold-filling means having a dischargeopening at one end of the sprue-opening, of a mold-carriage movable toward and from said discharge-opening; a pin on said carriage and located at the other end of the sprue-opening;` a separable mold on said carriage and embodying a pair of sprueforming side dies having sprue-channels one communicating with said discharge-opening and the other closable by said pin and means for separating said dies while the casting is sustained by said pin.

15. In a casting-machine, the combination, With a mold embodying a pair of dies, of moldfilling means; mold separating means forI shifting said dies in different directions; and a pair of mold-Scrapers movable relatively to and across the cheeks of said dies.

16. In a casting-machine, the combination, with a mold embodying a pair of dies, of moldilling means; mold separating means for IOO IIOvl shifting said dies in different directions; a pair of mold-Scrapers movable relatively to and across the cheeks of said dies; and scraperactnating means for advancing said serapers toward each rated.

17. In a casting-machine, the combination, with a mold embodyinga pair of dies, of moldlling means; mold-separatingr means for shifting said dies in different directions; a pair of mold-Scrapers movable relatively to and across the cheeks of said dies; and scraperactuating means for advancing said scrapers toward each other during the opening of the dies.

18. In a casting-machine, the combination, with a mold embodying a pair of oppositelydisposed dies, of` mold-lling means 5 moldseparating means for shifting said dies in other While the dies are sepa` dilierent directions; a pair of oppositely-disposed mold-Scrapers movable relatively to and across the cheeks of said dies; and scraperactuating means for advancing" said Scrapers' toward each other While the dies are sepacharge-nozzle; mold separating means for shifting said dies in dierent directions; and

a pair of mold-Scrapers movable relatively to and across those cheeks of the dies which coact with the face of said discharge-nozzle.

CURTIS H. VEEDER.

Witnesses:

ELBRIDGE P. ANDERSON, HENRY BIssELL. y

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