US1193007A - fuller - Google Patents

Description

J. W. FULLER.

MOLDING MACHINE. APPLIcAnoN mfp ma. s. 19t-e.

Patea Aug. 1, 1916.

2 SHEETS-SHEET l.

J. W. FULLER.

MOLDING MACHINE.

vMPucmlon FILED MAlLa. 19|6.

1,193,007. l Patented Aug. 1, 1916. Y l

2 SHEETS-SHEET 2.

JOHN W. FULLER, OF COLUMBUS, OHIO, ASSIGNOR TO .UNITED STATES CAST IRON PIPE & FOUNDRYCOMPANY, OF BURLINGTON, NEW JERSEY, A CORPORATIONOF NEW JERSEY.

MOLDING-MACHINE.

Application filed March 8, 1971.6.. Serial No. 82,907.

Columbus, in the countyof Franklin 'and' State of Ohio, have invented certain new and useful Improvements yin Molding-Machines, of which the following is a specification.

This invention relates to molding machines of the type particularly adapted for large and heavywork wherein the tamping is done automatically.

The main object'of my invention resides in the provision of mechanismwhich permits the anvil a free drop in a true verticall line so arranged that at least a portion of the driving gearing may be rotated at a greater rotative speed under the influence of the falling anvil than would be produced by the driving motor.

As stated more specifically,'this structure may also take the form of a lost motion driving connection interposed between the motor and the elevating means for the anvil, which lost motion drivingv connection has a play suiiicient to allowthe anvil a free fall.

Still a further object of my invention resides in a structure whereby the driving motor is connected in such manner that it is permitted to gather substantial speed before the actual load of elevating the anvil 'is placed upon' it.

Still a further object of my invention re'- sides in a structure where the anvil is'given a vertical'upward movement without being` subjected to any side thrust. By this strue. ture, there is no uneven wear on any par-1 ticular part and in addition, there naturally would not eXist a side thrust to influence the anvil in its descent.

Another and very important object` is the arrangement of parts whereby a comparatively small power unit maybe used as the driving medium. j

The preferred embodiment of my invention is shown in the accompanying sheets of drawings, in which similar characters of reference designate corresponding parts, and in which: A

Figure 1 is a longitudinal cross section taken through my improved type of molding machine, Fig. 2 is a horizontal section taken on line 2 2 of Fig. 1, Fig. 3 is a secltion taken on two planes as represented by line 3 3 of Fig. 1, Fig. 4 is a section as specification of Letters Patent.

Patented Aug. 1, 1916.

represented by line 4 4 of Fig. 1, showing the position of the parts just preceding the fall o f the anvil, 5 is a similar view but showing the position of the parts just after .the fall ofthe anvil, Fig. 6 is a top plan view showing the gear` for operating the anvil, Fig. 7 is'a section taken on line 7 7 'of Fig. (i, Fig. Sis an enlarged detail of the lost motion vdriving connection between the gearing and the elevating means for the anvill and, Fig.f 9 isa section taken on line 8 8 of Fig. 7.` u 1 In these drawings, the base structure or framework :is designated by thereference numeral 1,-it being understood that this base lstructure is mounted upon any type of foundation of a' somewhat cushioning nature. Centrally disposed with respect to the base structure there'is provided an upstanding hollow cylinder or barrel such as is shown atf2, which barrel has its exteriorsurface finished and serves as the guide structure for the depending internally finished cylinder or barrel '3 'carried by the underside of the anvil 4. 'j Thatportion of the base unit located within the barrel 2 is provided with a pair of bearings 5 in which the driving shaft 6 is located. This driving shaft is provided with a cam such as is shown at 7 and this cam is designed to operate in conjunction with the intermediate roller shown at 8.-v This cam is so proportioned with respect to the stop ledges 1?* and 4a on the base and anvil respectively that it runs idle for a substantial'. portion of each revolution. In other words, the hump on the cam does not become effective to actually elevate the anvil until the shaft 6 has made' a partial revolution all as clearly shown by a comparison of Figs. 4 and 5. This roller 8 is rotatably mounted on the spindle shown at 9 and the latter is permitted a free vertical movement up and down within the slotted portions 10 of the upstanding ears11. These slotted portions 10 serve to guide the spindle 9 vin a true vertical ldirec'tion'and in this manner the side thrust caused j by the humped portion of the cam as it rolls over the surface of the roller 8y is taken up by the side walls of the slots 10. The roller 8 also engages the roller 12 rotatably mounted on a spindle 13, which latter is supported in depending ears 14 carried by the underside of the anvil itself. It will appear from the description thus far, that no side thrust whatever is imposed upon the roller 12 and, therefore, the anvil is free of any influence which would tend to move it in a direction other than true vertical, provided, of course, that the foundation is correct. In view of the absence of all sidethrusts on the roller 12, there is no undue strain on the bearing surfaces between the barrels 2 and 3 and, therefore, the anvil itself is permitted a movement up and down in a truc vertical direction without a side thrust tending to destroy this free movement.

The machine as a whole is driven by 'a motor 15 which, in the present instance, 1s shown as being an electric motor, but it is to be understood that the term motor is comprehensive enough to include all driving mechanisms which serve as a source of power, as the particular motive power forms no portion of this invention. The armature shaft 16 has joined to it by means of a jaw clutch to be presently described, an extension or continuation 16a journaled in bearings 1S which carry the fly wheel shown at 17. Between these bearings there is located a driving pinion 19, which latter meshes with a spur gear 20 mounted on a counter shaft 21. This counter shaft is also rotatably journaled in bearings 22 and 23 and further, carries a spur pinion 24. This spur pinion 24 then meshes with the gear 25 located on the extension or continuation 6 of the shaft 6, the shaft 62l itself being suitably supported beyond the anvil in bearings 26 and joined to the shaft 6 by means of a jaw clutch also to be presently described. In order to allow the motor to gather slight headway before the load is placed directly on it, I have provided the shaft 16 with square jaw clutch members 27 and 28. The teeth 29 on the member 27 are considerably smaller than the sockets 30 in the member 28 in which these teeth fit and in fact, the amount of lost motion or play between the two clutch members is suflicient to allow the motor to gather considerable speed before the fly wheel 17 and train of gearing are set in motion. In order to also allow the motor 15 time to reach its full speed and to store up energy in the fly wheel 17 and the large gears 20 and 25, the driving shaft 6 is also provided with a set of square jaw clutch members 31 and 32. It will be noted that the teeth 33 are considerably smaller thanthe sockets 34 in which they fit. By this arrangement, a comparatively small motor may be used, inasmuch as the shaft 6 is not instantly set in motion and, therefore, the driving gearing runs idle through a great portion of each revolution of the shaft 6. During this portion, the motor is free of all load except that of overcoming the inertia of the driving gearing and the fly wheel land the energy stored up 1n the gearing and especially the fly Wheel is suflicient to assist the motor to a very marked extent when the hump on the cam 7 becomes effective. Thus a comparatively small motor may be used for driving the machine. In my present design, the motor l5 is allowed approximately fifty revolutions before the clutch members come into such relation as will cause a turning of the drive shaft 6, but even at this point which is illustrated in Fig. 5, the hump on the cam has not become effective. It will be understood that this arrangement of allowing the shaft 6 to run idle because of the cam not becoming effective except after a partial revolution, simply increases the time allowed the other rotating parts to reach full speed and to store up additional energy as the power required is the same no matter how soon the cam becomes effective for the same rise. serves the purpose of allowing the anvil a free fall after it has been elevated the required distance. An inspection of Fig. 4 will disclose that after the hump on the cam 7 has passed beneath the roller 8, the anvil will be allowed to descend. However, the effect of gravity is effective the instant the hump is passed and the distance through which the anvil falls is such that the anvil itself will acquire a velocity so great that the roller 8 instead of having a free fall, will engage the straight surface 35 of the cam. This is because the motor has been geared down to such an extent that the rotative speed after moving this portion of the cam out of interference is notl as great as the velocity acquired by the falling anvil. Because of the lost motion connection between the clutch members 31 and 32, the anvil actually causes the shaft 6 to move through a small arc faster than the rotative movement caused by the motor 15, because of the short time engagement between the roller S and the cam surface 35. The free movement of the shaft 6 under the anvils influence is then permitted because of the lost motion connection, without in any way disturbing the speed of the motor 15 and without placing any additional strain on the train of gearing. In fact, the driving strainon this gearing is entirely removed. However, the advantage in this construction and arrangement is not only in removing the strain from the gearing or relieving the motor 15, but also resides in permitting the anvil a free and unrestricted fall to thereby get the full benefit of the jar at the end of the fall.

From the foregoing description, it will be apparent that I have provided a type of molding machine wherein there is no influence to cause a Vside thrust on the anvil in either its elevation or its fall and further,- this anvil is permitted an unrestrained fall.

These two features create a machine which The clutch construction also does not require the flask to be held ony its working surface, but the weight of the flask itself is sufficient to hold it in place without shifting during the operation of the machine. In addition, a comparatively small power medium is required as a great amount of work is done by the stored up energy acting to supplement the motor which itself does a comparatively uniform amount of work throughout the cycle of operation. I'Vhen the peaks are reached, the stored up energy carries the motor over and when the load is removed, the motor stores up the energy.

As has been stated, the foundation is preferably of a cushioning nature to alleviate the shock of the anvil upon the base structure l. In order that the driving mechanism may not change the natural vibrations set up by the impact of the anvil on the base structure, I have so proportioned the cam 7 lthat at the end of the fall of the anvil, this cam is not effective as regards its operative engagement with the roller 12. In other words, at the end of the fall of the anvil, the

roller 8 is out of engagement with the rollerk 12 and the edge la is relied upon to form the base on which the anvil rests. In this manner, any pivotal or universal movement of the anvil about the driving cam as a cen* ter, is not set up as forming a portion of the vibrations after impact.

-What I claim, is:

l. A molding machine comprising a base structure, an anvil operatively mounted for vertical movement, a motor, and driving means connected with said motor for elevating said anvil and then letting it drop, said means including a lost motion drive connection.

2. A molding machine comprising a base structure, an anvil operatively mounted for vertical movement, a motor, and driving means connected with said motor for elevating said anvil and then letting it drop, said driving means being arranged so that at least a portion may be rotated at a greater rotative speed under the influence of the falling anvil than would be produced by said motor.

8. A molding machine comprising a base structure, an anvil operatively mounted for vertical movement, a motor, and driving means operatively connected between said anvil and said motor for elevating said anvil and then letting it drop, said driving means including a clutch whose parts are connected to have a play sufficient to allow the anvil a free fall. f

4. A molding machine comprising a base structure, an anvil operatively mounted for vertical movement, a motor, driving gearing between said motor and said anvil, elevating means for said anvil between said anvil and said gearing, and a lost motion drive connection between said elevating means and said gearings having a play sufiicient to allow said anvil a free fall. v

5. A molding machine comprising a base structure, an anvil operatively mounted for vertical movement, a motor, driving gearing between said motor and said anvil, elevating means for said anvil between said anvil and said gearing, a lost motion drive connection between said elevating means and` said gearing having a play sufficient to allow said anvil a free fall, and a lost motion drive connection between said motor and said gearing having a play sufficient to allow the motor to gather speed before said Vgearing is set in motion, said first named lost motion drive lconnection also allowing the motor and gearing to attain proper speed before the anvil is elevated.

6. A molding machine comprising a base structure, an anvil operatively mounted for vertical movement, a motor, elevating means for said anvil, driving gearing between said elevating means and said motor, and a lost motion drive connection between said motor and said gearing having a play suflicient to allow the motor to gather speed before said gearing is set in motion.

7 A molding machine comprising a base st-ructure, an anvil, a guide structure between said base and said anvil for guiding the anvil in a vertical direction, a roller carried by the underside of said anvil, an elevating cam mounted in vertical alinement with said roller, and a second roller interposed between said cam and said first named roller so mounted to allow it a vertical movement under the influence of said cam.

8. A molding machine comprising a base structure, an anvil operatively mounted for vertical movement, a motor, elevating means for said anvil, a driving gearing connected between said motor and said means for elevating the anvil, said gearing being ar ranged in such respect with said motor and said means that the motor is allowed to run free of the load of lifting the anvil for a given portion of each cycle of operation.

9. A molding machine comprising a base structure, an anvil operatively mounted for vertical movement, a motor, elevating means for .said anvil, a driving gearing connected between said motor and said means for elevating the anvil, and a fly wheel carried by said gearing, said gearing being arranged in such respect with said motor and said v means that the motor is allowed to run free of the load of lifting the anvil for a given portion of each cycle of operation.

10. A molding machine comprising a base structure, an anvil operatively mounted for vertical movement, a motor, and driving means operatively connected between said anvil and saidl motor for elevating said anvil and then letting it drop, said driving means including a Clutch whose parts are connected to have a play suilieient to allow the anvil a free fall, and a fly wheel carried by the motor shaft, said fly wheel being furtheil loeated between said eluteh and said motor.

ll. A molding machine comprising a base structure, an anvil operatively mounted for vertical movement, a motor, driving gearing between said motor and said anvil, elevating means between said anvil and said gearing, a lost motion drive connection between said elevating means and said gearing having a play sniiieient to allow said anvil a free fall, a lost motion drive conneetion between said motor and said gearing having a play sufficient to allow the motor to gather speed before said gearing is set in motion, said rst named lost motion drive connection also allowing the motor and gearing to attain proper speed before the anvil is elevated, and a ily wheel on the motor shaft and disposed between said two clutches.

l2.. A molding machine comprising a base structure, an anvil operatively mounted for vertical movement, a motor, elevating means for said anvil, driving means Connected with said motor and said elevating means for elevating said anvil and then letting it drop, and stop structures carried by said anvil and said base structure on which the anvil rests after it has fallen, said elevating means being arranged to be out of actual operative Contact with the anvil when it is at the end of its fall.

In testimony whereof I aHiX my .signature in presence of two witnesses.

JOI-IN `W. FULLER. lVitnesses:

VALTER E. S. BooK, A. L. PI-IELPS.

Copies of this patent may be obtained for f ive cents each, by addressing the Commissioner of Patents, Washington, D. C.

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