US2043755A - Slug casting machine - Google Patents

Description

June 9, 1936.

G. P. KmGsBuRY SLUG CASTING MACHINE Filed Feb. 16, 1935 4 Sheets-Sheet l 1 VENTO HZLW.

A TTORNEY June 9, 1936.

a. P. KINGS BURY SLUG CASTING MACHINE Filed Feb. 16, 1935 4 Sheets-Sheet 2 llk lkhhlkll.

ATTORNEY June 9, 1936. e. P. KINGSBURY 2,043,755 SLUG CASTING MACHINE Filed Feb. 16, 1935 4 Sheets-Sheet 3 Illll A Tram/5y l VENTOR June 9, 1936. G. P. KINGSBURY' SLUG CASTING MACHINE Filed Feb. 16, 1935 4 Sheets-Sheet 4 -11v VENTOR w w w .A TTORNEY Patented June 9, 1936 PATENT OFFICE SLUG CASTING MACHINE George Peyton Kingsbury, Hollis, N., Y., assignor' to Mergenthaler Linotype Company, a corporation of New York Application, February 16, 1935, Serial No. 6,796 20 Claims. (or. 199-56) This. invention relates to sine casting machines of the general organization representedin U. S.

Letters Patent to O. Mergenthaler No. 436,532,

wherein a type bar or slug is cast in a slotted mold against a composed line of matrices, and then forced out of the, mold and into a galley byan ejector which advances against the rear edge thereof.

As is well known, the mold. is fixedly mounted on a mold wheel or carrier, and during each ma-- chine cycle of operation the carrier is'rotated through a quarter revolution to carry the mold from the ejecting to the casting position, and thence through the remaining three-quarter revolution to carry the'mold from the casting position-back to the ejecting position. At, the. casting position, the composed line of matrices is presented momentarily to one face of the mold, a metal pot brought against the opposite face of the mold, and molten metal injectedby a pump from the metal pot into the mold whereit congeals against the line of matrices to form the type bar or slug. During the formation of the type bar'or slug considerable heat is absorbed by the mold, hence it is customary to cool the stud about which the mold carrier rotates so that when the machine is run continuously to produce a number of slugs, the heat thus absorbed by the mold does not accumulate to the extent that it prevents the slugs fromcongealing at the proper rate; While in general, this arrangement is satisfactory, yet

in certain machines, as for example, those adapted to the production of slugs above 36-point in thickness and up to 42 ems in length, it has been found advisable to employ an auxiliary cooling chamber. This auxiliary cooling chamber is usually located at the ejecting station ina position closely adjacent the rear face of the mold and heretofore it has been fixedly mounted with sufficient intermediate clearance to permit free rotation of the mold carrier. In practice, however, it. has been found that this auxiliary cooling chamber is limited in its effectiveness due to the fact that the clearance between the back of the mold and the face of the auxiliary cooling chamber constitutes an air pocket which tends to prevent the transfer of heat from the mold to the auxiliary cooling chamber.

To overcome this objection and, the attendant difficulties it is proposed to bring the mold and the cooling chamber together in contacting relation during a pause in the rotationof the mold carrier and to hold them thus under. pressure during this period to insure; good thermal contact therebetween, and tothis end .the auxiliary cooling chamber, in the present embodiment of; the, invention, is; resiliently mounted on the machine and means are provided which operates automatically to move the mold carrier backwardly beyond'its rotating position to carry the mold into contact withthe cooling chamber at the end of a machine cycle of operation and then to move the mold carrier forwardly to its rotating position to carry the mold out of contact with the cooling chamber at the beginning of the next succeeding machine cycle of operation.

For a clear understanding of the invention, reference may be madeto the accompanying drawings wherein;

g/1 is a side view, partially in section, of a' machine embodying the principles of the present invention Fig. 2 is a front view showing a mold mounted on a mold carrier andhaving a portion of the mold broken awayto show the position of the cooling unit behind themold;

Fig. 3 is a rear view, in section, the section being taken alongthe line33 of Fig; 4, which, in

turn, is, a plan View, in section, taken along the line4-4 of Fig. 2 and showing the mold presented against the face of the cooling chamber;

Fig. 5 is aview similar to the view shown in Fig. 4, but showing the mold spaced from the cooling chamber;

Fig. 6 is an enlarged detail view of the mechanism employed in reciprocating the mold carrier and,

Fig, '7 is a view similar to Fig. 6, and which, when taken in connection with Fig. 6 shows the distance that the mold carrier is retracted beyond the positionit usually assumes at the end of a machine cycle of operation.

The mold I0 comprises, as usual, a body portion I land a cap portion l2 which constitute the side walls of a mold cavity l3, and intermediate liners M which constitute the end walls of the cavity, the rear faces of the various elements of the mold being so shaped or formed as to-proscrews 10.

As is. wellilgnown, the mold wheel lt durlng;

the production of a type bar or slug and again during the ejecting operation to carry the mold 19 into and out of engagement with a pair of trimming knives (not shown) between which the type bar or slug passes as, it is forced out of the mold ill by the action of a fore and after ejector slide 2| and composite ejector blades 22 which are mounted for reciprocation in the mold slide l8.

The reciprocatory movement of the mold carrier I6 is accomplished, as usual, by the mold slide '18 which carries the lateral arm or hub l1 upon which it is mounted, the mold slide l8 being moved forwardly and backwardly in guideways 23 under the influence of a continuously grooved face cam 24 which is mounted on the main drive shaft 25 of the machine and to which the slide is operatively connected by mechanism including a suspended lever 26, the upper end of which is pivotally secured, as by a stud 21, to the main frame of the machine and the lower end of which is provided with a rearwardly disposed roller 28 posi- 'tioned in the continuous groove 29 in the face of the cam 24 and with a forwardly disposed roller 39 positioned in a recess 3| formed in the rear end of the mold slide l8.

Ordinarily, the mold carrier I6, in receding after ejection, is arrested in its rotating position as the machine comes to rest after completing a machine cycle of operation, but in accordance with the present invention means are provided for retracting it slightly beyond its rotating position "at this time to carry the mold l0 into contact with a cooling chamber A and then at the start of the next cycle to restore it to its rotating position so as to break the contact between the mold and the cooling chamber.

The cooling chamber A, as best shown in Figs. 2, 3, 4 and 5, is located at the ejecting station and it comprises a vertically disposed housing member 32 closed at its front end by a face plate 33 and an intervening gasket 34, the face plate 33 and gasket 34 being secured to the walls of the housing member 32 by screws 35. The face plate 33 is desirably made from a good heat conducting metal, and it is shaped to conform with the rear face of the cap portion l2 of the mold l0; and to permit the face plate 33 to be cooled, the housing member 32 is provided with an inlet pipe 33 and with an outlet pipe 31, the inlet pipe 36 being adapted and arranged to be connected to a source of water or other cooling medium and the outlet pipe 31 being adapted and arranged to be connected to a suitable drain.' v

In the present instance, the cooling chamber A is slidably mounted on the forward end of the mold slide l8, this sliding connection being obtained by positioning two tongues 38 and 39 carried ,by the housing member 32 in horizontal grooves 40 and M respectively which are cut in the sideface of the mold slide l8, and to prevent the tongues from falling out of the grooves a vertically disposed plate 42 is fastened, as by the mold slide 18 by a compression spring 43 disposed in the rear end of a horizontally disposed cylinder 44 threaded into a recess 45 in the main frame of the machine, the front end of the spring 93 being positioned against the rear face of a plunger 45 which is slidably mounted in a guide nut 43 threaded into the outer end of the cylinder 44 and the forward end face of which engages the oppositely disposed rear end face of an adjusting screw 4! carried by the rear wall of the housing member 32, and to limit the forward movement of the cooling chamber A under the influence of the compression spring 43, the vertically disposed plate 42 is provided with a stud 48 which extends into a slot 49 cut in the side face of the lower tongue 39.

The retraction of the mold carrier l6 beyond its rotating position to carry the mold Ii! into engagement with the face plate 33 of the cooling chamber'A as the machine comes to rest after completing a machine cycle of operation, and'its advancement to its rotating position to carry the mold out of engagement with the face plate 33 at the beginning of the next machine cycle of operations is accomplished, in accordance with the present embodiment of the invention, by means including the continuously grooved face cam 24 which makes one complete revolution during each machine cycle of operation, and to this end, as best shown in Fig. 1, the continuous groove 29 in the face of the cam 24 is so formed as to present a recessed segment 50 in addition to two low segments 5! and 52 and two high segments 53 and 54. As usual the first low segment 5| is adapted and arranged to maintain the mold carrier It in its rotating position while it is being rotated from the ejecting to the casting position, the succeeding first high segment 53 is adapted and arranged to advance the mold carrier It to and maintain it in its forward position while a type bar or slug is being cast in the mold l0 and then to restore it to its rotating position, the succeeding second low segment 52 is adapted and arranged to maintain the mold carrier I6 in its rotating position while it is being rotated from the casting around to the ejecting position again, and the succeeding second high segment 54 is adapted and arranged to advance the mold carrier iii to and maintain it in its forward position while the type bar or slug is being ejected from the mold in and then i to retract it after the slug has been ejected. The recessed segment 50 which is provided in the continuous groove 29 in the face cam 24 is positioned between the end of the second high segment 5'4 which retracts the mold carrier I 6 after the slug has been ejected from the mold l0 and the beginning of the first low segment 5| which maintains the mold carrier H5 in its rotating position while -it is being rotatedfrom the ejecting to the casting position, and it is formed by cutting away the inner wall of this portion of the continuous groove 29 and by adding a cam plate 55 to the oppositely disposed portion of the outer wall of the groove.

Under these conditions, the rearwardly disposed roller 28 which is carried by the lower end of the suspended lever 26 becomes engaged by the recessed segment 50 as the machine comes to rest at the end of a machine cycle of operation and by the first low segment 5! in the continuous groove 29 of the face cam 24 when the next machine cycle of operation is started. As the recessed segment 55 engages the rearwardly disposed roller 28 at the end of a machine cycle of operation the mold carrier I6 is carried backwardly beyond its rotating position and, as shown I'U is pressed against the faceplate 33 oi the resiliently mounted cooling chamber A. Thenas the rearwardlydisposed roller 28 becomes engaged by the first 10w segment 51 of the continuous groove 29 at the beginning of the next succeeding machine cycle of operation, the mold carrier I6 is carried forwardly to its rotating position and, as shown more clearly in Fig. 5, the rear face of the mold I0 is carried out of contact with the face plate 33. Hence, during the interval between successive machine cycles of operation, the rear face of the mold I0 is maintained in, contact with the face plate 33 under pressure exerted by the compression spring 43 and as a result heat from the mold I0 is transferred to the cooling chamber A at a rate faster than heretofore possible.

In the accompanying drawings, the invention has been shown merely in preferred form and by way of example, but obviously many changes and variations may be made therein and in the mode of application without departing from its spirit. It should be understood, therefore, that the invention is not limited to any specific form or embodiment except in so far as such limitations are set forth in the appended claims.

Having thus described my invention, I claim:

1. In a slug casting machine, the combination of a mold, a cooling chamber therefor, and means for disestablishing and establishing contact between said mold and said chamber during a machine cycle of operation.

2. In a slug casting machine, the combination of a mold, a resiliently mounted cooling chamber, and means for disestablishing and establishing contact between said mold and said cooling chamber during a machine cycle of operation.

3. In a slug casting machine, the combination of a mold, a cooling chamber therefor, and means for bringing said mold and said chamber into contact with one another at the end of a machine cycle of operation and for separating said mold and said chamber at the beginning of the next cycle of operation.

4. In a slug casting machine, the combination of a mold, a cooling chamber, means for presenting said mold against said chamber at the end of a machine cycle of operation and for separating said mold and said chamber at the beginning of the next cycle of operation, and means for maintaining said mold and said chamber together under pressure during the time said mold is presented against said chamber.

5. In a slug casting machine, the combination of a mold, a cooling chamber therefor, and a rotatable mold carrier, said carrier being movable forwardly from a position of rest to its rotating position and thereafter backwardly from its rotating position during each machine cycle of operation to carry the mold against said chamber.

6. In a slug casting machine, the combination of a mold, a cooling chamber therefor, a rotatable mold carrier, said carrier being movable forwardly from a position of rest to its rotating position and thereafter backwardly from its rotating position during each machine cycle of operation to carry the mold against said chamber, and means for maintaining said mold against said chamber under pressure.

7. In a slug casting machine, the combination of a. mold, a cooling chamber therefor, a mold carrier, a slide whereon the said carrier is rotatably mounted, and means operable during each machine cycle of operation for moving said slide forwardly to locate the carrier in itsrotating position and thereafter backwardly from its rotating position 'to carrythe moldagainst the cooling chamber.

8. A combination as in claim 7, characterized by the fact that the said means consists of a power driven cam operatively connected to the slide.

9. A combination as in claim 7, characterized by the fact that the cooling chamber is slidably mounted on the mold slide.

10. In a slug casting machine, the combination of a mold, a cooling chamber therefor, a mold carrier, a slide whereon said carrier is rotatably mounted, and means operable during each machine cycle of operation for moving said slide forwardly to locate the carrier in its rotating position and thereafter backwardly from its rotating position to resiliently present said mold against said cooling chamber.

11. In a slug casting machine, the combination of a mold and a cooling chamber therefor, said chamber being capable of bodily movement in making and breaking contact with said mold.

12-. In a slug casting machine, the combination of a mold capable of reciprocable movement during each machine cycle of operation and a cooling chamber arranged in the reciprocal path of the mold, said chamber being resiliently mounted.-

13. In a slug casting machine, the combination of a mold, a rotatable carrier therefor movable forwardly from a position of rest to its rotating position and thereafter backwardly from its rotating position to its position of rest during each machine cycle of operation, and a cooling chamber resiliently mounted and adapted to yield under pressure of the mold as the carrier alternates its position of rest.

14. In a slug casting machine, the combination of a mold, a cooling chamber therefor movably mounted and arranged in contacting relation to the mold, and a spring associated with said chamber for holding it resiliently against the mold.

15. In a slug casting machine, the combination of a mold, a mold carrier, means for intermittently rotating said carrier to advance said mold from the slug ejecting position to the slug casting position and thence to the slug ejecting position during each machine cycle of operation, a cooling chamber, and means for bringing said mold and said chamber into contact with each other after the slug ejecting operation and for separating said mold and said chamber before the rotation of the carrier during a next succeeding cycle of operation.

16. In a slug casting machine, the combination of a mold, a mold carrier therefor, means for intermittently rotating said carrier to advance said mold from the slug ejecting position to the slug casting position and thence to the slug ejecting position during each machine cycle of operation, a cooling chamber, and means for presenting said mold against said chamber after said mold has been restored to its slug ejecting posi tion and for separating said mold from said chamber before the rotation of said carrier during a succeeding machine cycle of operation.

17. A combination as set forth in claim 16 characterized in that the cooling chamber is resiliently mounted so that contact between the mold and the chamber is assured and maintained.

18. In a slug casting machine, the combination of an intermittently rotatable element, a cooling chamber therefor, and means for establishing contact therebetween only during a pause in the rotation of the element.

19. In a slug casting machine, the combination of an intermittently rotatable element, a cooling of an intermittently rotatable element, a resilchamber therefor, and. means for establishing iently mounted cooling chamber therefor, and and. disestablishing contact therebetween only means for establishing contact therebetween only during a pause in the rotation of the element. 5 during a pause in the rotation of the element. GEORGE PEYTON KINGSBURY. 5

- 20. In a slug casting machine, the combination

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