US601512A - Apparatus for forming pipe-molds - Google Patents

Description

3 Sheets-Sheet 1.

(No Model.)

J. K. GUNN'. APPARATUS FOR FORMING PIPE oms.

No. 601,512. Patented Mar. 29, 1898.

Inventr.

Witnesses.

. Attorney.

ZZV/QAX- (No Model.)

I 3 Sheets-Shee't 2. J. K. GUNN.

APPARATUS FOR FORMING PIPE MOLDS;

Patented Mar; 29, 1898.

/% INVEN-TORA ATTORNEY- (NovModeL) 3 SheetsSheet 3.

J. GUNN.

APPARATUS FOR FORMING PIPE MOLDS.

No. 01,512. Patented M3 129, 1898.

llllllll ll Ellllllll f //V WY %%Q%iil i gay/4W ATTORNEY- NITE 'TATES JOHN K. GUNN, OF UTICA, NEW YORK.

APPARATUS FOR FORMING PlP E-MOLDS.

SPECIFICATION forming part of Letters Patent No. 601,512, dated March 29, 189

Application filed March 6, 1897.

To zrZZ whom it may concern.-

Be'it known that I, JOHN K. GUNN, a citizen of the United States, residing at Utica, in the county of Oneida and State of New York, have invented a new and useful Improvement in Apparatus for Forming Pipe-Molds; and I do hereby declare that the following, in connection with the accompanying drawings, is a full, clear, and exact description of the invention.

' My invention relates to new and improved pipe-molding apparatus for forming pipemolds in the stationary flasks, whereby without tamping the sand is well and uniformly packed in the mold and the surface is smoothly finished, thus preventing bulges and irregularities in the exterior of the pipe and giving to it a smooth surface.

. My apparatus is comparatively simple and cheap to construct and easy and quick in operation. Its'essential features are a rotating packer having an irregular surface and a non-rotating follower or finisher attached to a shaft, whereby simultaneously the packer and finisher are elevated and the packer rotated. The finisher has a regular surface and performs the double function of a guide for the packer and of finishing and smoothing the interior of the mold after the sand has been packed.

My invention will be understood by reference to the accompanying drawings, in which the same numerals of reference indicate the same parts in all the views.

Figure I is a front elevation of the appara tus, showing the double flask in section. Fig. II is a corresponding side View showing also the top of the turn-table in sections. Fig. III is an enlarged View of the lower end of the double flask, showing one packer and one finisher in elevation, the others in vertical section. Fig. 1V is an enlarged elevation of the packer detached. Fig.Vis a horizontal crosssection thereof. Fig.VI is a horizontal crosssection on line VI VI of Fig. I, the teeth of the gear being indicated. Fig. VII is a vertical section on line VII VIIof Fig. VI. Fig. VIII is a vertical section substantially at right angles to the preceding on line VIII VIII of Fig. VI. Fig. IX is a horizontal cross-section on line IX IX of Fig. I. Figs. X and XI are respectively rear and side views of the bracket Serial No. 626,202. (No model.)

for carrying the links which sustain the rtating gears. Figs. XII and XIII are respectively a side elevation and plan of one of said links. Fig. XIV illustrates a modification in the form of the packer.

In Figs. I and II are shown the usual pits in which flasks 1 1 are sustained, single or double, as here shown, on ramming-seats 2 2, secured onturn-table 3. These flasks are of various sizes for the molding of various sizes of pipe and are commonly divided longitudinal 1y into halves connected by hinges, (shown in Fig. 1,) so that they may be easily opened and the cast pipe dropped out.

4 is the main shaft for sustaining and opw crating the packer or former 5 and the finisher, follower, or guide 6, the essential features of my invention. This shaft is preferably tubular to give strength, stiffness, and lightness. The packer is formed with camshaped projections, one or more, as may be desirable, so that its greatest diameter is greater than the diameter of the shaft.

I have shown a desirable form of packer provided with several projections spirally arranged, having the narrow circumferential surfaces 9 9, to which lead on one side the gradually-curved surfaces 8 .8, and on the other side abrupt curves 1O 10, as best shown in Figs. IV and V. ing greater than that of the shaft, it is preferably beveled at its upper end 11 to avoid an abrupt shoulder. 'It may be connected to shaft by any desirable means asby internal thread 12, and to its lower end'is attached, as by thread 13, the extension-rod 14, on which is sustained to turn freely the finisher 6, held in place by nut 15. This finisher must be at least equal in diameter to the largest diameter of the packer; but I prefer to make it slightly larger, in which case its upper end may be beveled or the lower end of packer made with a regular circumferential surface 16 equal in diameter to finisher.

Vithin the opening 17 of the ramming-seat, through which drops the finisher, is inserted from below the ring 18, held in place by lugs 19, which ring, projecting upwardly into the mold, forms it for casting the bead on the end of the pipe. As shown in Fig. II, the form 20 for the head of the pipe, through which the shaft extends and operates, is sustained dle is drawn up and down.

of the ring 18.

Operative mechanism. Any desirable mechanism may be used to rotate and elevate the packer and finisher; but the special apparatus that I have invented and here shown is simple and effective. To the front of the I-beams 30 30, supported on the edge of the pit, are secured brackets 31 31, carrying the guides or guide-rods 32 32. To the back of the I-beams is journaled the cross-shaft 33, carrying on one end the mainpower-wheel 34 and on the other the pinion 35. Near the middle of cross-shaft 33 is keyed the bevelgear 36, meshing with gear 37 on the lower end of the back shaft 38, sustained in bearings 39 39. To the upper end of the back shaft is keyed the gear 40, meshing with gear 41, keyed to upper'end of front shaft 42, sustained in bearing 43 at its upper end and in a corresponding bearing at its lower end.

The rotation of shafts 4 4 and packers 5 5 is effected through intermediate mechanism sustained on frame or saddle 44, by means of a gear 45, sliding on shaft 42, but connected thereto by means of feather 57 on shaft or gear and corresponding spline, so that it will rotate therewith.

Elevating mecham'sm.-'lhe saddle 44, gear 45, and all the intermediate mechanism sustained on the saddle, together with shafts 4 4, packers, and finishers, are elevated by the following means: To'eyebolts 46 46 on the saddle are connected ropes, chains, or bands 47 47, passing up over pulleys 48 48 and 49 and down to drum 50, journaled in brackets 51 51 on the back of the I-beams 30, on one end of which drum is a gear 52. On the corresponding end of cross-shaft 33 is the pinion 35, arranged to rotate on shaft by means of feather and spline, but having a little play thereon, so that it may be thrown into and out of engagement with gear 52, as by lever 53. A clutch of desirable form, to one member of which the pinion may be connected, or other means for rotating the drum may be substituted. Then this pinion is thrown into engagement with drum-gear 52, the'druin is rotated, winding up the ropes, and the saddle is elevated on the guides, together with the other parts, including the main shafts and packers, while they are rotating. This elevation maybe effected at any desirable rate of speed, which is regulated with reference to the speed of rotation of the packers by the comparative size of the gears 35 and 52. The size of the other gears may of course be varied as desired.

Saddle and intermediate 'mec7zam'sm.The saddle 44 is provided with bearings 60, fitted to the guide-rods 32 32, 011 which the sad- To the rear of surface of the shelf 64 of the saddle and are provided with central openings to receive the shanks 65 65 on the inside of the gears 66 66 for holding said gears in position on the'ends 0f the links, so that they maybe swung nearer together or farther apart, but constantly in engagement with gear 45. In Fig. VI the shelf of the saddle is shownin dotted lines cut out at 67 67 to permit this swing.

To the front of the saddle and under the overhanging shelf is secured a detachable support 68, provided with double bearings 69 69 for sustaining the shafts 4 4, formed on their upper ends with heads having shoulders 70 70 for engaging with bearings 69 69. It is evident that supports fitted to the saddle may be provided having a single bearing for sustaining a single shaft and packer to be used when a single mold is to be formed instead of a double mold. The connection between these shafts 4 4 and the gears 66 66 is made by means of the short shafts 71 71, provided with heads 72 72. Keyways are formed in these short shafts, and in the interior of gears 66 and shafts 4 4 are fitted keys 73 73, by which means these rotating gears communicate their motion to the shafts 4 4 and packers. This means of connection between gears and main shafts may be varied in many ways. For instance, the short shafts 71 71 may be made square or angular and the gears and shaft-heads formed to fit.

lllodc of operaiioa-lt will be seen that by this arrangement the same mechanism for operating the packers and finishers may be used with various sizes of flasks and pipe-molds. When smaller pipes are to be molded, the gears 66 66, sustained on the links, are swung nearer together. When larger, farther apart, being always centered over the flasks. The size of pipe to be cast having been decided upon the flasks (here shown double) are set in position on the ramming-seat, carried onthe turn-table in the pit, and swung into position under the apparatus herein described. The rings for forming the bead in the mold are set in position in the lower ends of the flasks. When the pipe is molded head down, the formers for the head of course take the place of these rings. The detachable support 68, carrying main shafts, packers, and finishers, is secured in position on the saddle,.and the packers are carefully centered and lowered into the flask to the position shown in Figs. I and II, the finisher-guide 6 extending downwardly through opening 100 in turn-table 3. The

sand is then poured in and the operative mechanism set in motion, which may be done as soon as the sand covers the packer, by which means the packer is rotated and the finisher simultaneously elevated, packing the sand firmly and uniformly and smoothly finishing the interior of the mold throughout its whole length. I prefer to rotate the packer a few times before throwing pinion 35 into engagement with gear 52 and beginning the elevation, by which the sand at the bottom is well packed. The packer is preferably rotated in the direction indicated by the arrows in Figs. IV, V, and XIV. The head-form is not disengaged from its hook and set in the upper flaring end of the flask till the packer approaches the upper end of the flask, in order to avoid danger of clogging and of blocking flow of sand.

The packer and the finisher may each be as long as may be desired. One to two feet for each is a good size. The projections or ribs on the packer may be as many as desirable, generally fewer for smaller molds, more for larger, and of any desirable form, though I much prefer the spiral arrangement of ribs .shown in Figs. IV and V.

The support 68 is detachable, it being necessary to sustain the different sizes of shafts and packers, each in their own support 68, of such size and form as to center the upper ends of the shafts under the gears 66 66, carried on the swinging links, to which gears the shafts are connected by short shafts 71 71.

Relation to prior cm.I am not the first to propose the use of a rotating former or packer having a cam shape or irregular surface, and therefore I do not claim this broadly; but what I have invented and do intend to claim broadly as an essentially new device which overcomes certain grave defects in old devices and is very useful and practically operative is such a former or packer sustained on the end of the rotating shaft which is connected at its other end to the operative mechanism without any bearings or means for sustaining the shaft and packer at any other point and the combination of my rotating packer and non-rotating finisher and guide so sustained; also, the detailed construction and arrangement of the operative mechanism.

Many yearsago the forming of pipe-molds was suggested by means of ashort former or packer having projections on its surface and secured to the lower end of a shaft by which it was rotated and elevated of the type shown in the Smith patent, No. 83,668. All such were found to be impractical and were not used for the general reason that the bearings and other means which were necessarily provided to make the packer run true made it very inconvenient to change the packer and shaft to form molds of different sizes. As different sizes of pipes must be cast often on the same day and at the same time, it is absolutely essential in all these devices that packer and shaft may be quickly and conveniently' changed. Both the packer and supporting-shaft must be changed for different sizes of molds, as a certain proportion mustbemaintainedbetweenthem. Theshaft must be enough smaller than the packer to mold by the packer.

give sufficient sand room that is, to permita certain amount of sand to lie around the shaft to 'be compressed into a good firm If, however, there is too much sand room there will be too much sand to be packed and the packer will work with difficulty and be clogged and not form a good mold. Bearings for guiding the shaft and packer are objectionable because they are cut by the sand. The device of said Smith patent would be open to these objections and to others that the packer on the end of the shaft would not run true, but would be forced from side to side as it moved. This supporting-frame would have to be excessively high to accommodate the sliding carriage. In Smiths patent, No. 69,854, he showed a device having said disadvantages, in which it was proposed to guide the packer and shaft by an internal shaft. This would probably guide the packer well enough for larger sizes, but for smaller sizes the guidingshaft would be too small and would spring. Many years later the endeavor was made to overcome these objections by the useof heavy rotating packers of an entirely difierent type equal in length to the mold, so that the whole mold was packed at once.: These required the objectionable bearings, had to be adjusted with great care, did not give sufiioient sand room, were so heavy and. clumsy that they were inconvenient to change, and required excessive power to operate. 17 They were expensive both to make and to operate.

My apparatus may be said to belong to the Smith'type, in which a short spiral packer is sustained and operated on the end of a shaft, but is essentially different therefrom in its construction and mode of operation, by which it overcomes the old disadvantages- It is simple, quick, and convenient in changing sizes and adjustment for either single or double molds. The objectionable bearings are avoided, the main'shafts being attached to the saddle at a single point, which is at their upper ends and as far as possible from the sand. None of the parts which touch the sand pass through a bearing. The finisher acts as an absolute guide for the packer. It

should be carefully centered in the mold; but 1 a slight variation may be disregarded, as the packer will be drawn out absolutely straight.

Alittle rotation of the finisher will do no- 1. In a machine for forming pipe-molds, the i combination of a rotating packer provided with projections for forcing the sand outwardly, a non-rotating finisher-guide arranged adjacent to and below the packer, of equal or greater diameter than the greatest diameter of the packer through said projections, and means for sustaining and operating the packer and the finisherguide.

2. In a machine for forming pipe-molds, the combination of a rotating packer provided with spiral projections for packing the sand, a non-rotating finisher-guide of equal or greater diameter than the greatest diameter of the packer through said projections,supported adjacent to and below the packer, and means for sustaining and operating the packer and finisher-guide.

3. In a machine for forming-pipe-molds, the combination of a rotating packer provided with integral spiral projections for forcing the sand outwardly, and supported immediately below the packer a non-rotating smooth cylindrical finisher-guide of greater diameter than the greatest diameter of the packer through said projections, and means for susraining and operating the packer and the finisher-guide.

4. In amachine for forming pi pe-m olds, the combination of a supporting-shaft, a rotating packer formed with projections for packing the sand, secured to the lower end of said shaft, a non -rotating finisher-guide of equal or greater diameter than the greatest diameter of the packer through said projections secured by a supplementary sup-,

port to said shaft immediately below said packer, and means for simultaneously rotating and elevating said shaft.

5. In a machine for forming pipe-molds, the combination of a supporting-standard, a carriage sliding vertically thereon, a shaft connected at its upper end to said saddle and supported only at that point, a rotating packer formed with projections secured to the lower end of the shaft, a non-rotating finisherguide supported immediately below the packer, and means for elevating and rotating said shaft. I

6. In a machine for forming pipe-molds, the combination of a rotating packer formed with a short, tapering top and an irregular surface, and supported immediately below the packer a non-rotating finisher-guide of equal or greater diameter than the greatest diameter of the packer through said projections, and means for operating said packer and said finisher-guide.

7. In a machine for forming pipe-molds,

mechanism for sustaining and operating the rotating packers, consisting of a frame, and'in combination therewith and supported thereon a vertical rear shaft, a parallel front shaft, gears in engagement secured to the upper end of each shaft, means for applying power to the rear shaft; a saddle fitted to slide on the frame; and sustained on said saddle the following parts: a main gear fitted to slide on the front shaft and to rotate therewith, links having the center on which they swing corresponding with the center of said gear, supplementary gears carried on the outer ends of said links meshing with said main gear, main 3 shafts, packers and finishers supported on said main shafts, and intermediate connections between said supplementary gears and said main shafts.

8. In a machine for forming pipe-molds, mechanism for sustaining and operating the rotating packers, consisting of a standard, and in combination therewith vertical, frontand rear shafts, gears in engagement secured to the upper end of each shaft, means for applying power to the rear shaft; a saddle fitted to slide on guides secured to the standard; and supported on said saddle the following parts; a main gear fitted to slide on said front shaft and to rotate therewith, supplementary gears meshing With said main gear, main shafts, packers and finishers carried thereon, and intermediate connections between said supplementary gears and said main shafts.

9. In a machine for forming pipe-molds, mechanism for sustaining and operating the rotating packers, consisting of a supportingstandard and sustained thereon vertical front and rear shafts, carrying engaging gears; means for applying power to the rear shaft; a saddle fitted to slide on guides carried on said standard and supported on said saddle the following parts: a rear bracket sustaining a main gear fitted to slide on said front shaft and to rotate therewith, links centered to swing on said bracket, supplementary gears sustained on the outer ends of said links, a detachable support secured to the front of said saddle carrying the main shafts, and short, intermediate shafts keyed to said supplementary gears and to said main shafts for transmitting rotary motion to said main shafts, and rotating packers sustained on said main shafts. v

10. In a machine for forming pipe-molds,the combination of a standard or frame; a horizontal shaft journaled thereon, carrying the power-wheel, a gear fixed on the shaft and a pinion adapted to slide thereon and to rotate therewith; a drum journaled on the frame parallel to said shaft, a gear secured to said drum; means for throwing said pinion into and out of engagement with said drum-gear; a vertical shaft journaled in bearings on the rear of said frame, carrying on its lower end a gear engaging with said cross-shaft gear, and on its upper end another gear; a front shaft journaled in bearings on the front of said standard, and a gear on the upper end of said front shaft engaging with said gear on the upper end of the rear shaft; guides supported on said frame; a saddle or carriage fitted to slide on said guides, a bracket secured to the rear of said saddle, a main gear sustained on said bracket and fitted to slide on said front shaft and to rotate therewith;

links supported and centered on said bracket and adapted to swing thereon; a forwardlyextending shelf integral with said saddle, on which said links rest; supplementary gears sustained on the front ends of said links and engaging with said main gear; a detachable support secured to the front of said saddle and provided with bearings in which are journaled main shafts carrying the packers and finishers; short shafts secured to said supplementary gears and to said main shafts for communicating rotary motion to said shafts; ropes, bands, or chains secured to said saddle, passing upwardly over pulleys and downwardly to said drum to which they are secured, and pulleys for sustaining said chains.

11. In amachine for forming pipe-molds,the combination of a standard or frame; a horizontal shaft journaled thereon, a power-wheel secured .to one end of said shaft, a bevel-gear secured to the middle thereof, and a pinion on the other end adapted to slide on said shaft and rotate therewith; a drum journaled on said frame parallel to said shaft, a gear secured to said drum; means for throwing said pinion into and out of engagement with said drum-gear; a rear Vertical shaft journaled in bearings on said frame, a bevel-gear secured to the lower end thereof, engaging with the bevel-gear on the horizontal shaft, a gear secured to the upper end of the rear shaft; a vertical front shaft journaled in hearings on front of said frame, and a gear on the upper end of said front sh aft, en gaging with said gear on the upper end of said rear shaft; parallel, vertical guides secured to the front of the frame; a saddle or carriage fitted to slide up and down on said guides, a bracket secured to the rear of said saddle, a'main gear sustained on said bracket and fitted to slide on said front shaft and to rotate therewith; links supported andcenteredon said bracket and adapted to swing thereon; integral with the saddle a forw'ardly-extending shelf on which the links rest, said shelf being cut out in front to permit the swing of the links; supplementary gears sustained on the front ends of the links in engagement with the main gear, a detachable support secured to the front of the saddle under the shelf and provided with bearings in which are journaled and sustained main shafts, carrying the packers and finishers; short shafts secured to the supplementary gears and to the main shafts for communieating rotary motion to said main shafts; and ropes, bands, or chains attached to the saddle, passing upwardly over pulleys secured near the top of the frame and thence downwardly to the drum to which they are attached, and pulleys secured near the top of the frame for sustaining said chains.

In witness whereof I have hereunto set my hand, in the presence of two attesting witnesses, at Utica, in the county of Oneida, in the State of New York, this 26th day of February, 1897.

JOHN K. GUNN;

Witnesses:

ALFRED WILKINSON, G. O. SOHOENEOK.

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