US2759380A

US2759380A - Ejection mechanism for metal forming presses

Info

Publication number: US2759380A
Application number: US322404A
Authority: US
Inventors: Alfred F Bauer; Pack Charles
Original assignee: Nat Lead Co
Current assignee: NL Industries Inc
Priority date: 1952-11-25
Filing date: 1952-11-25
Publication date: 1956-08-21
Anticipated expiration: 1973-08-21

Description

Aug. 21, 1956 A. F. BAUER ETAL 3 Sheets-Sheet l EJECTION MECHANISM FOR METAL-FORMING PRESSES Filed Nov. 25, 1952 l 1 ll fl t I I i I I 1 \h a" l A m I I I 4 l VIII/l, O

Ill]

CHHRLES ac VB L NTLOL BY? E ATTORNEY Aug. 21, 1956 A. F. BAUER EIAL 2,759,380

EJECTIQN MECHANISM FOR METAL FORMING PRESSES Filed NOV. 25, 1952 5 Sheets-Sheet 2 66 INVENTOR HLFRED F. BQUEP CHQRLE PHCK BY ATTO R N EY g- 1956 A. F. BAUER ETAL EJECTION MECHANISM FOR METAL FORMING PRESSES Filed Nov. 25, 1952 3 Sheets-Sheet 3 w wt INVENTOR FILFRED E BAUER BY CHHRLE PAC ATTORNEY United States Patent EJ'ECTION MECHANISM FOR METAL FORMING PRESSES Alfred F. Bauer and Charles Pack, Toledo, Ohio, assignors, by mesne assignments, to National Lead Company, New York, N. Y., a corporation of New Jersey Application November 25, 1952, Serial No. 322,404 Claims. ((11. 78-18) This invention relates to metal forming presses, especially forging presses, and more particularly to ejection mechanism for the same.

For certain purposes it is required that a piece be forged rather than die cast because of improvement in characteristics resulting from the forging operation itself. For this purpose a metal slug of proper dimension may be preliminarily heated and then placed in the cavity of a die which may be closed, following which the slug may be shaped by a forging ram moved into the die cavity under enormous pressure. In this way the piece may be forged to final dimension in a single step, but difficulty may arise in securing dependable and easy removal of the forged piece from the die cavity. By withdrawing the forging ram before opening the die the piece may be kept with the movable or ejector portion of the die. By then moving an ejector, which in most cases may act also as a core, the piece may be forced from the movable die. However, because of the enormous pressure under which the piece was formed, and because of shrinkage, it may be difiicult to dislodge the forged piece from the ejector, and one specific object of the present invention is to facilitate this.

Heretofore the surfaces of the forged piece have been given a substantial taper in order to insure removal of the piece from the die. Thus cylindrical surfaces have been made conical with a taper of from 3% to 7% This has increased the work and expense of machining the forged piece to final dimension. A further object of the present invention is to overcome this difiiculty, and to make it possible to form substantially cylindrical surfaces in a forged blank when cylindrical surfaces are desired.

Still another object of the invention is to facilitate discharge of the finished piece from the press. For this purpose I provide an inclined chute which automatically moves into position beneath the forged piece when the die is open so that the stripped piece slides down the chute and out of the press.

A still further object of the invention is to provide means for automatically operating the parts of the press and ejection mechanism in proper timed sequence.

Still another object of the invention is to provide ejection mechanism particularly well adapted for use with a forging press of the type disclosed in a co-pending application of the same inventors, Serial No. 322,456, filed on even date herewith, and making use of preferably cast slugs of a non-ferrous alloy, specifically, aluminum, magnesium, brass, bronze, or zinc, as disclosed in copending application of the same inventors, Serial No. 315,128, filed October 16, 1952.

To accomplish the foregoing objects, and other more specific objects which will hereinafter appear, the invention resides in the ejection mechanism and forging press elements, and their relation one to another, as are hereinafter more particularly described in the following specification. The specification is accompanied by drawings, in which:

Fig. 1 is a fragmentary section through a closed die housing the slug which is to be forged;

Fig. 2 is a schematic section showing the parts after the forging step;

Fig. 3 is a section through the movable die after ejection, and after stripping;

Fig. 4 is a fragmentary section similar to Fig. 1, but showing the forging of a piece of different shape;

Fig. 5 is a fragmentary section after the forging operation;

Fig. 6 is a fragmentary section after ejection and prior to shipping;

Fig. 7 is a diagrammatic view showing a press embc-dying the automatic ejection mechanism and arranged for automatic operation;

Fig. 8 is a section in elevation taken through the die and ejection mechanism of a forging press, embodying features of my invention;

Fig. 9 is a fragmentary section taken in elevation in the plane of the line 99 of Fig. 8 to show the ejector mechanism;

Fig. 10 is a fragmentary section at the die cavity after closing of the die;

Fig. 11 is a section similar to Fig. 8, but following the forging step;

Fig. 12 is a similar view, but after ejection and prior to insertion of the stripper and chute;

Fig. 13 is a similar section after insertion of the stripper and chute;

Fig. 14 is a fragmentary section after stripping;

Fig. 15 is a section taken approximately in the plane of the line 15-15 of Fig. 8; and

Fig. 16 is a plan view of the end portion of the stripper.

Referring to the drawing, and more particularly to Fig. 1, a slug 14 is inserted in a die cavity 12 while the die is open. The slug is made of a desired metal, say aluminum, and is heated to a suitable temperature which, of course, depends on the particular alloy to be forged, for if the temperature is too low the forged piece may have minute cracks or fissures, and if the temperature is too high there may be partially molten components with such ready flow of metal as to lose the desired benefit of the forging operation with its accompanying elongation of grain or crystal structure. However, some metals may be forged at room temperature.

The die is then closed, following which a forging ram 16 is raised under enormous pressure. This deforms the piece to a desired shape, illustrated in Fig. 2, which, in the present case, is somewhat like two cups arranged back to back. The forging ram 16 acts as a lower core to form the lower cavity, while the upper cavity is formed by a core 18 which acts also as an ejector. During the forging operation the core 18 is preferably solidly backed, as indicated at 20, in order to withstand the enormous forging pressure. The slug 14 is made slightly greater in volume than the metal needed for the forged piece, resulting in some flash 22 at the parting face of the die, and the die is preferably provided with an overflow channel 24 to receive excess flash. The upward motion of the forging ram 16 is positively stopped by suitable outside stops, not shown, to insure dimensional accuracy of the forged piece.

After the forging operation the forging ram 16 is withdrawn, and the die then opened. Because of the withdrawal of the forging ram, and because of the configuration of the piece, it remains with the upper die portion 26. By operating the pinion 28 and rack 30 the ejector core 18 moves the piece to the position shown in Fig. 3, following which a plate 32 may be inserted, as shown, between the forged piece 34 and the die 26. It will be evident that by reversing the pinion 28 and so retracting the ejector 18, the piece 34 will be forcibly stripped from the ejector, as shown, and in accordance with a further feature of the invention, an inclined chute 36 is moved beneath the forged piece 34 at the same time that the stripper 32 is inserted. The stripped piece falls on to the chute and slides out of the press.

In Fig. 3 it will be seen that the stripper 32 bears against a shoulder 38 on the forged piece. It so happens that the particular part there shown requires a ledge at 38, and this ledge is used in the stripping operation. However, it is not essential that the forged piece have such a ledge, and referring to Figs. 4, and 6 I there show the forging of a part which is generally conically shaped and which is stripped with the aid of the flash. In Fig. 4 a slug 40 has been placed in a cavity 42 formed largely by increased withdrawal of the forging ram 44. In the case of a conically shaped piece the diameter of the forging ram may be intentionally increased, if desired, to facilitate reception of a slug of desired proportion, and there is accordingly flexibility of design both as to the diameter and the axial length of the slug.

In Fig. 5 the forging ram 44 has been raised and the slug has been deformed to produce a forged piece 46 with flash at 48. In Fig. 6 the ejector core 50 has been advanced and a stripper 52 has been inserted between the flash 48 and the upper die portion 54.

In the particular piece here shown there are steps or shoulders at 56 and at 58, and either of these might be used for the stripping operation, but in that case the motion of the ejector 50 would have to be far greater than the motion required when using the flash 48, as here shown.

One preferred mechanical arrangement of the ejection mechanism is shown in Figs. 8 and 9 of the drawing, and subsequent stages in the operation of the same are shown in Figs. through 14. Referring first to Fig. 9', it will be seen that pinion 28 meshing with rack 30 is itself actuated by a rack 60 connected at 62 to the double acting piston in an hydraulic cylinder 64, the latter being mounted on the ejector portion 66 of ejector die 68 by means of appropriate brackets 70. It will be understood that the pinion 28 is longer in axial direction so as to mesh with both the vertical rack 30 and the horizontal rack 60, these being displaced sidewardly, as indicated in Fig. 8.

It will also be seen from Fig. 8 that the rack 60- may be guided between the

die parts

66 and 68. The pinion 28 may be inserted and housed in accordance with common practice. It will be understood that one main reason the ejector is operated somewhat indirectly as shown is in order to avoid need for connection to the upper end of the ejector, so that the latter can be solidly backed, with its reaction taken by the head of the press in order to successfully withstand the enormous force exerted by the forging ram. There is no need for the pinion and rack mechanism to withstand any of the forging pressure.

Referring now to Figs. 8, and 16, the die 68 also carries guide rails 72, which in turn carry a cylinder 74. This carries a piston, the piston rod of which is connected to a slide 76 which moves along the guide rails 72. The slide 76 may be formed integrally with or carries a plate or stripper 80, and in the present case the forward end of this is slotted at 82 to form a bifurcation dimensioned to fit around a part of the forged piece when moved to a position straddling the axis of the ejector.

The slide 76 also has secured thereto depending supports 84 from which a pair of spaced arms 86 extend inward beneath but spaced from the stripper 80. At their forward ends the arms 86 carry the upper end 88' of a discharge chute 90, and the connection therebetween is preferably a pivotal connection, as indicated at 92 in Fig. 8.

The lower portion of chute 90 has secured therebeneath one or more guide rails 94 received in one or more guide Wheels 96 rotatably supported at 98 Oman" 4 arm projecting outwardly from and secured to the stationary head of the press. This arm is not shown but its function is indicated by the dot-and-dash line 100.

The operation of the parts may be explained with reference to the successive figures of the drawing. In Fig. 8 the movable die 68 has been raised, thereby exposing the die cavity. A heated slug of metal 102 is placed in the open die cavity. The movable die 68 then descends, thereby closing the die as shown in fragmentary Fig. 10, following which the forging ram 104 is raised under enormous pressure, adequate to easily squeeze and deform the slug into the desired double cup shape, as shown in Fig. 11. It will be noted that piston 74 and associated parts descend with the movable die 68, thus v with the movable die 68. The ejector core 106 is then tapers heretofore thought necessary in a forging die.

advanced by actuation of the gear rack 60 as previously described in connection with Fig. 9, thus forcing the forged piece 108 out of the die 68 as shown in Fig. 12. However, at this time the forged piece would still adhere strongly to the ejector core.

The cylinder 74 is now activated to move the slide 76 inward, as shown in Fig 13, and it will be seen that the stripper is moved to a position between a shoulder on the forged piece 108 and the die 68. At the same time the inner end of the chute is moved with the stripper to. a position beneath the forged piece. At this time the chute is in an angular position such that the dislodged piece will slide readily down the chute.

In Fig. 14 the ejector core 106 has been retracted, thereby forcibly stripping the forged piece 108 from the ejector core so that it falls gravitationally onto the chute 90 and thence out of the press.

The final step in the operation corresponds to the position of the parts shown in Fig. 8, that is, the cylinder 74 is again activated to remove the stripper and chute from between the upper and lower parts of the die, thus clearing the way for the beginning of another complete cycle, for which purpose another heated slug is put into the lower die cavity preparatory to closing of the die.

Reverting now to Fig. 10, this figure shows a slight working or deformation of the slug 102 prior to operation of the main forging ram 104. In other words, the closing of the die has itself initiated some deformation of the metal because the axial height of the slug is slightly greater than the axial spacing between the ejector core 106 and the forging ram 104. However, in the main it is preferred to close the die without deforming the slug, that is, the shape and dimension of the slug is so selected in relation to the die cavity as to be received in the cavity when the die is closed, as shown in Figs. 1 and 4, in which case all working of the metal is performed in a closed die by means of the forging ram. This is of particular advantage in making it possible to use a forging press in which the die is closed by a toggle arrangement as described in the co-pending application Serial No. 322,456 previously referred to. The use of toggle mechanism. results in great economy of power in that the operating cylinder may be small in diameter, but with toggle mechanism the main die closing force is exerted only at the instant of closing of the die and not over a long stroke.

One of the important features of the present invention is that it makes it unnecessary to provide the substantial In the forgedpiece 34 shown in Fig. 3 it willbe seen that there are three

cylindrical surfaces

110, 112 and 114,

and one tapered or frusto-conical surface 116. It happens that the piece there shown requires a frusto-conical surface, and the die cavity has been oriented to take advantage of the desired taper. However, in prior practice the three cylindrical surfaces shown would also have been given a substantial taper, the prevailing practice being to use a taper of at least 3% and ranging up to 7%. With the present invention, however, these surfaces may be made substantially cylindrical, thus greatly reducing the amount of machining needed later to finish the piece. The surface 112 may be made cylindrical because the forging ram is withdrawn under power while the forged piece is confined in the die. The surface 114 may be made cylindrical because the forged piece is ejected under power by the ejector core. The surface 110 may be made cylindrical because the forged piece is stripped from the ejector core under power.

Considering next the forged piece shown in Fig. 6, the conical surfaces there shown have been made conical because that is the intended shape of the piece. However, the surfaces at 118, 119 and 120 are substantially cylindrical, but in accordance with the prior practice would have been given a large taper, say 3 to 7%.

In the case of the forged piece 108 shown in Fig. 14, all of the surfaces shown are substantially cylindrical, although in practice more taper might be provided at the surface 122. Because the upper part of the piece is confined both inside and outside, while the lower part of the piece, after withdrawal of the forging ram, is confined only on the outside, it may be anticipated that the piece will remain with the upper die when the die is opened. The die may be designed with that in mind, but in the event that difliculty should arise with an occasional piece remaining in the lower die, it is an easy matter to then provide more taper at the surface 122.

The automatic operation of the press is schematically illustrated in Fig. 7 of the drawing, referring to which the stationary die 124 is mounted on the stationary head 126, while the movable die 128 is mounted on movable head 130, the latter being moved by a die closing cylinder 132. In the drawing this is shown as a large diameter, double-acting, direct-acting cylinder, but in practice it may be a small diameter cylinder working on the movable head 130 through toggle mechanism, as disclosed in co-pending application Serial No. 322,456 aforesaid.

The forging ram 134 is operated by a large diameter cylinder 136 disposed beneath stationary head 126. This has been shown as a double-acting cylinder, but it may be a large diameter, single-acting cylinder with a reentrant small diameter, single-acting cylinder for downward or withdrawal movement, as is also disclosed in co-pending application Serial No. 322,456 aforesaid. The stripper 138 and chute 140 are operated by cylinder 142, and the ejector is operated by cylinder 144, both cylinders being attached to and movable with the die 128.

Cylinders

142 and 144 have, for simplicity, been shown in the same plane, but in practice may be at right angles, as was described in connection with Figs. 8 and 9.

All cylinders are connected by suitable supply pipes to a main valve box 150. This may contain a timing shaft or cam shaft driven by a suitable timing motor schematically indicated at 152. The motor may be started by means of a starting button 154, following which the cycle shaft is turned through one complete revolution corresponding to one complete cycle of operation of the press. It will be understood that the cams are so related on the timing shaft as to operate the parts of the press in desired sequence, specifically, to first close the die, to then forge the blank, to then withdraw the forging ram, following which the die is opened. With the die open, or during the latter part of the die opening movement, the forged piece is ejected, and thereafter the stripper and chute are inserted. These steps may be overlapped somewhat to speed the press operation, that is, the ejection step may take place during the opening of the die after the die has partially opened, and the insertion of the stripper may take place during the latter part of the opening of the die, provided that ejection has already taken place. This economy in time is one of the advantages of mounting the

cylinders

142 and 144 on the movable die for movement therewith.

Immediately upon insertion of the stripper the ejector may be retracted, with consequent stripping and discharge of the forged piece, whereupon the stripper and chute may be removed from beneath the upper die. By comparison of Figs. 12 and 13 of the drawing it will be seen that the slope of the chute is increased as the chute moves out of the press, so that even if there were any delay in discharge of the forged piece, it is nevertheless accelerated and dislodged by the outward movement of the chute, as well as by being subjected to a steeper chute angle.

In practice the cylinder 142 (Fig. 7) may be air operated, for there is no appreciable load, while the

cylinders

132 and 136 and 134 are preferably hydraulically operated. It will also be understood that certain expedients Well known in the art may be resorted to, although not shown in Fig. 7. For example, the hydraulic valves are frequently themselves air operated, and thus the cycle timing cam shaft may work on air valves, which in turn control hydraulic valves. Moreover, if an electrical system is desired it is common to employ solenoid operated air valves, in which case the timing shaft need control only electrical switches, which in turn control solenoid air valves, which in turn control hydraulic valves. Moreover, as is already known to those skilled in the art, certain steps in the operation may be interlocked and controlled by one another, as, for example, by using microswitches as limit switches, the closing of the die may operate a microswitch to initiate the operation of the forging ram. Opening of the die may operate a microswitch and thereby initiate ejection, and similarly, completion of ejection may operate a microswitch and thereby initiated insertion of the stripper, and so on. Such an arrangement is merely an alternative way of accomplishing the desired and above described sequence of operation, which is the important thing.

The parting face of the die and the resulting fin or flash are preferably located at the largest diameter of the piece, as shown in Figs. 3, 6 and 14. Thus the flash is easily removed by a separate trimming operation in a suitable trimming die, following which the forged piece may be finished by appropriate machining operations, as, for example, to form internal or external threads.

By use of the present invention a slug of an aluminum alloy containing some copper and silicon may be employed. This results in a forged piece having greater strength than when using substantially pure aluminum. Such a slug is preferably forged after heating, but this does not introduce difficulty such as arises with hot forging of steel, for the aluminum alloy slug may be forged at a relatively low temperature, say 700 to 800 R, which does not introduce any serious problem of scaling or oxidation. The invention may be used with all forgeable alloys, some of which may be forged cold, and others of which may require a higher temperature than the aluminum alloy.

The slug is preferably lubricated, as by daubing it with a mixture of oil and graphite, just before the forging step.

It is believed that the construction and operation of the present improved ejection mechanism for metal forming presses, as well as the advantages thereof, will be apparent from the foregoing detailed description. It will also be apparent that while the invention has been shown and described in a preferred form, many changes may be made within the scope of the invention, as sought to be defined in the following claims.

We claim:

1. A forging press comprising a stationary head carrying a stationary die, a movable head carrying a movable die for movement toward and away from the stationary die, an ejector movable through said movable die and forming therewith an upper die surface to forge a piece larger than the cross-section of said ejector, said ejector being so shaped that it will retain the article thereon, operative means actuable to advance the ejector to remove the article from the surrounding die and hold it in spaced relation thereto, a stripper slidable along the parting face of the movable die when open into the space between the forged piece held by the ejector and the movable die, means to so advance the stripper, and the aforesaid operative means being operable to retract the ejector, whereby said forged piece is stripped from the ejector by said stripper.

2. A forging press comprising a stationary head carrying a stationary die, a movable head carrying a movable die for movement toward and away from the stationary die, an ejector movable through said movable die and forming therewith an upper die surface to forge a piece larger than the cross-section of said ejector, said ejector being so shaped that it will retain the article thereon, operative means actuable to advance the ejector to remove the article from the surrounding die and hold it in spaced relation thereto, a stripper slidable along the parting face of the movable die when open into the space between the forged piece held by the ejector and the movable die, means to so advance the stripper, the aforesaid operative means being operable to retract the ejector, whereby said forged piece is stripped from the ejector by said stripper, and a discharge chute the upper end of which is connected to and movable with the stripper.

3. A forging press comprising a stationary head carrying a stationary die, a movable head carrying a movable die for movement toward and away from the stationary die, an ejector movable through said movable die and forming therewith an upper die surface to forge a piece larger than the cross-section of said ejector, said ejector being so shaped that it will retain the article thereon, operative means actuable to advance the ejector to remove the article from the surrounding die and hold it in spaced relation thereto, a stripper slidable along the parting face of the movable die when open into the space between the forged piece held by the ejector and the movable die, means to so advance the stripper, the aforesaid operative means being operable to retract the ejector, whereby said forged piece is stripped by said stripper, a guide roller supported at one side of the stationary head, and an inclined discharge chute the upper end of which is pivotally connected to and movable with the stripper, and the lower end of which rests on said guide roller, whereby the chute is moved in to a position beneath the formed piece when the stripper is inserted, and whereby the chute is moved outward and its inclination steepened when the stripper is removed from its position between the stationary and movable dies.

4. A forging press comprising a stationary head carrying a stationary die, a movable head carrying a movable die for movement toward and away from the stationary die, a combined core and ejector movable through said movable die and forming therewith an upper die surface to forge a piece larger than the cross-section of said ejector, said ejector being so shaped that it will retain the article thereon, operative means actuable to advance the ejector to remove the article from the surrounding die and hold it in spaced relation thereto, a bifurcated stripper slidable along the parting face of the movable die when open into the space between the forged piece held by the ejector and the movable die and straddling the axis of the ejector, means to so advance the stripper, and the aforesaid operative means being operable to retract the ejector, whereby said forged piece is stripped by said stripper.

5. A forging press comprising a stationary head carry ing a stationary die, a movable head carrying a movable die for movement toward and away from the stationary die, a combined core and ejector movable through said movable. die and forming therewith an upper die, surface to forge a piece larger than the cross-section of said ejector, said ejector being so shaped that it will retain the article thereon, operative means actuable to advance the ejector to remove the article from the surrounding die and hold it in spaced relation thereto, a bifurcated stripper slidable along the parting face of the movable die when open into the space between the forged piece held by the ejector and the movable die and straddlingthe axis of the ejector, means to so advance the stripper, the aforesaid operative means being operable to retract the ejector, whereby said forged piece is stripped by said stripper, and a discharge chute the upper end of which is connected to and movable with the stripper.

6. A forging press comprising a'stationary head carrying a stationary die, a movable head carrying a movable die for movement toward and away from the stationary die, a combined core and ejector movable through said movable die and forming therewith an upper die surface to forge a piece larger than the cross-section of said ejector, said ejector being so shaped that it will retain the article thereon, operative means actuable to advance the ejector to remove the article from the surrounding die and hold it in spaced relation thereto, a bifurcated.

stripper slidable along the parting face of the movable die when open into the space between the forged piece held by the ejector and the movable die and straddling the axis of the ejector, means to so advance the stripper, the aforesaid operative means being operable to retract the ejector, whereby said forged piece is stripped by said stripper, a guide roller supported at one side of the stationary head, and an inclined discharge chute the upper end of which is pivotally connected to and movable with the stripper, and the lower end of which rests on said guide roller, whereby the chute is moved into a position beneath the formed piece when the stripper is inserted, and whereby the chute is moved outward and its inclination steepened when the stripper is removed from its position between the stationary and movable dies.

7. A forging press comprising a stationary head carrying a stationary die, a forging ram movable through the stationary die, means to ram or withdraw the forging ram, a movable head carrying a movable die for movement toward and away from the stationary die, an ejector movable through said movable die and forming therewith an upper die surface to forge a piece larger than the cross-section of said ejector, said ejector being so shaped that it will retain the article thereon, operative means actuable to advance the ejector to remove the article from the surrounding die and hold it in spaced relation thereto, a stripper slidable along the parting face of the movable die when open into the space between the forged piece held by the ejector and the movable die, means to so advance the stripper, and the aforesaid operative means being operable to retract the ejector, whereby said forged piece is stripped from the ejector by said stripper.

8. A forging press comprising a stationary head carrying a stationary die, a forging ram movable through the stationary die, means to ram or withdraw the forging ram, a movable head carrying a movable die for movement toward and away from the stationary die, an ejector movable through said movable die and forming therewith the upper die surface to forge a piece larger than the cross-section of said ejector, said ejector being so shaped that it will retain the article thereon, operative means actuable to advance the ejector to remove the anticle from the surrounding die and hold it in spaced relation thereto, a stripper slidable along the parting face of the movable die when open into the space between the forged piece held by the ejector and the movable die, means to so advance the stripper, the aforesaid operative means being operable to retract the ejector, whereby said forged piece is stripped from the ejector by said stripper, and a discharge chute the upper end of which is connected to and movable with the stripper.

9. A forging press comprising a stationary head carrying a stationary die, a forging ram movable through the stationary die, means to ram or withdraw the forging ram, a movable head carrying a movable die for movement toward and away from the stationary die, an ejector movable through said movable die and forming therewith an upper die surface to forge a piece larger than the cross-section of said ejector, said ejector being so shaped that it will retain the article thereon, operative means actuable to advance the ejector to remove the anticle from the surrounding die and hold it in spaced relation thereto, a stripper slidable along the parting face of the movable die when open into the space between the forged piece held by the ejector and the movable die, means to so advance the stripper, the aforesaid operative means being operable to retract the ejector, whereby said forged piece is stripped by said stripper, a guide roller supported at one side of the stationary head, and an inclined discharge chute the upper end of which is pivotally connected to and movable with the stripper, and the lower end of which rests on said guide roller, whereby the chute is moved in to a position be neath the formed piece when the stripper is inserted, and

vwhereby the chute is moved outward and its inclination steepened when the stripper is removed from its position between the stationary and movable dies.

10. A forging press comprising a stationary head carrying a stationary die, a fiorging ram movable through the stationary die, means to ram or withdraw the forging ram, a movable head carrying a movable die for movement toward and away from the stationary die, a combined core and ejector movable through said movable die and forming therewith an upper die surface to forge a piece larger than the cross-section of said ejector, said ejector being so shaped that it will retain the article thereon, operative means actuable to advance the ejector to remove the article from the surrounding die and hold it in spaced relation thereto, a bifurcated stripper slidable along the parting face of the movable die when open into the space between the forged piece held by the ejector and the movable die and straddling the axis of the ejector, means to so advance the stripper, and the aforesaid operative means being operable to retract the ejector, whereby said forged piece is stripped by said stripper.

References Cited in the file of this patent UNITED STATES PATENTS 1,480,142 Bell Jan. 8, 1924 1,589,273 Vaurs June 15, 1926 1,613,595 Able Jan. 1 1, 1927 1,951,229 Zeh Mar. 13, 1934 2,454,432 Crandall Nov. 23, 1948 2,693,159 Taylor Nov. 2, 1954