USRE12885E - bon villain - Google Patents

Description

P. BUNVILLAHL HYDRAULIC MOLDING PRESS. APPLICATION FILED JANA 1908.

12,885. Reissued NOV, was.

2 SHEETFJ-SHBET 1 .J 21' I I 22 M14 2'2 \l P. BGNVILLAXN.

HYDRAULIC MOLDING PRE$S.

APPLIGAIION FILED JANJL, 1908.

12,885 b Nov. 24%, 1908.

zl/l iizeascs: I u a whic i the 0 lowing is a speci cation.

. ports a mold-removing plate 1.7, the ends of J UNITED, STATES PATENT oir IcE. f p A PHILIBERT BONVILLAIN, OF PARIS, FRANCE, ASSIGNOR TO B. H'. MUMFORD COMPANY, OF

. PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

HYDRAULIC MOLDING-PBE SS Specification o1 Reiseued Letters Patent. Reiaaud-Nov. 24, 1908.

Original No. 816,577, dated larch 20, 1906, Serial No. 210,748. Application for reiuue filed January 4, 1908.

Serial No.

To all whom itmay concern: 1

Be it knownthat I, PHILIBERT Box ViLLAIN, a citizen of the Republic of France, and a resident of Paris, France, have invented certain new and useful Improvements in or Belatin to H draulic Moldin Presses, of

This invention relates to a hydraulic moldingness for foundries designed both so as to acilitate working and to reduce to a strict minimum the expenditure of water under pressure.

A press accordin to this invention is illustrated, by way 0 example, in the accompuny drawings, in which:

Figure 1 is a sectional elevation. Figure l'is a horizontal section on a plane in the direction of line a: w of Figure 1;;Figure 2 a side elevation, and Figure 3 a plan. Figure 4 is a vertical section alon the line 4 4 of Figure 5, showin a simplified construction of the press. *igure 5 is a horizontal section along the line 5 5 of Figure 4.

The machine shown in Figures 1 to 3 comprises'a hollow frame 6 of round or rectangular shape, the upper portion of which forms a ring or other sup ort or table'7, re cessed at its inner edge or the purpose of forming a shoulder 8, intended to receive the ends of the bars 9 9. The table 7 is rovided with a lateral lug 10, in whic is mounted a vertical column 11, on the top of which is pivoted a swinging cross-beam 12.' To the free end of this cross-beam is ivoted a depending hook 13, the lower end 0 which can engage under the outer edge of the table 7, as shown in the drawings.

On a horizontal partition 14 in the frame 6 is vertically mounted a cylinder 15,'in which works a piston 16. This piston sup which pro'ecting beyond the. frame, are guided in large openings 18 in the latter. The n per portion of the piston 16 is screwtliread zd for the purpose of receiving a nut 19, also screw-threaded outside to receive a tapped collar or rin 20. This collar can stopped by means 0 a set-screw." p

. he flange of the cylinder 15-is provided with a groove 22, adapted to reccive the' inner lower projection 23 of a half-ring 24, Figures 1 and 3, provided at the top with another inward projection 25, intended to form a stop for the collar 20, as hereinafter explained. The half-collar 24'is pivoted to a pin 26, secured to the partition 14, and is, on the other hand, connected by a rod 28 to an operating lever 27, pivotedfto the frame 6.

On the mold-removing plate 17, are mounted the rod. holders 29, secured to it by bolts 30, each bolt passing through an oblong hole,

so that the holder can be set in any suitable position. Each lrod-holder terminates in a split sleeve or socket for receiving the rod 31, which can be raised or lowered, as desired, vand fixed by a clamping -'s crew,' as shown in Figure3. The plate 17 is also pro:

vided with core-pushers 32, or with strip the end of a screw 39, secured to the ower cdgeof the cylinder 34, for preventing the piston 36 from turnin The piston is internally screw-threade to receive a screw threaded socket 40, havin a hand-wheel 41 on its lower end, and tie socket is also tapped to receive internally another-socket terminating at the bottom in a flange or'disk 43, to which is secured the press-plate 44.

The disk 43 is provided with a vertical rod 45, freel sliding in a lug 46 on the cross-bar 12 for t e' purpose of preventing the socket 42 from turni g. I

The pattern-plate 47 48 is fixed to the table 7 over the cross-bars 9. The box 49, containing the sand required for molding, is

placed in the usual manner on the pattern-- plate 47 48. This box'or flask is provided with laterallugs 50, the under sides of which are adapted to contact with the liftin rods 31.

' l'n order to eflect a molding operation, the

box- 49 is'fillcd with sandand is placed on "thepattern-plate 47 48. Therod-holders 29 are then so arranged that the rods 31 are immediately below the ln s 50 of the box and at a certain distance t crefrom, as 'will lsbrought into its normal ton device will elongate or ing as the hand-wheel is turned in one direco necessary expenditure of their ends with position by en further described below. The cross-beam 12 tent of comprefssion is fixed for all the cores.

The position the collar 20 regulates, theregagin the hook 13 under the outer edge of fore, the upward strolie of the; piston 16 to the ta 1e 7. The pushers 32 are also into place opposite, the cores of the plate 47 48, (see Figure 1). v

Water under pressure is being constantly admitted under the piston 35, which thus always has a tendency to raise the piston 36 and the late 44 upward. After this rising the avai able height above the mold ready for compression is regulated by, turning the hand-wheel 41. The socket 40 rotates with the hand-wheel, andsince neither the iston 36. nor the socket 42 can turn the who e pis- 111 pattern tion or the other. The pfiessure-plate 44 is thus brought by hand within a suitable distance oft e flask 49, thus avoiding the urn Sure, and waste of time, which would be unavoidable without this arrangement. The height of the plate 44 is adjusted once and for all for a given height of pattern-plate and flask. o

By means of suitable valve ear water under pressure is admitted onIt e top of the lar e piston 36, gin the modification shown in igure 1,) which descends with the pressure-plate 44 onto the sand contained in the box'and compresses it in the usual manner.

Water is then admitted under the piston 16, which raises the plate 17, therods 31, andthe pushers 32, which compress the cores and any other portion of the sand which is to be submitted to extra side. These pushers must at first only rise to the height required for efl'ecting the above compression in a proper manner. Imme'di ately that result is attained the upper end of the rods 31 must be so arranged as to come into contact with the lugs 50 on the box 49. For this purpose the-rods are provided at adjustable heads 31 31', which enable their length to be adjusted with all possible "precision. Moreover, before the ,above mentioned operation takes place the half collar 24 is brought into engagement with the groove 22 of the cyline115, the position of the collar 20 having been regulated by turning it in one direction or the 'lother, so that when the compression of the cores has been completed the collar 20 willengage against the upper projection 25 ofthc half-collar 24 andstop the ascent of the piston 16.

In the case where the large number of identical patterns are on the same plane, and consequentlya large number of cores of the same height, the collarQO is specially usefuh sh orten, accordwater under prespressure from the under they are all made of the same cores, and the mac 2 the mold,

In order to effect this removal,

wattljisaliowed to escape from the top cylmer e the piston of lever 27 the half-col sand parts that they ha the screw-threaded whichrises under the action of the small piston 35, still containing water under ar 24 is disengaged from the ring 20 and groove 22. There being now nothing to prevent the ascent of the piston 16, it rises under the action of the water, together with all The pushers32'support he cores or other previously com ressed, and the rods31 at the same time raise t e flask 49 bymeans of its In 50 until .it is suflicientl disengaged from t e patterns 47 5 48. to ena 1e it to be removed laterally; In the event of strip ing plates bein used for preventing any 0 the molded san from belng broken. awaythese plates-would also be raised by rods suitably arranged on the late 0 17. The bars 9 being capable of being p aced in any desired osition, it is easy to arrange them suitably or allowin free passage to the ushers The half-mo d or flask 49 having 11 removed, der 15 is allowed to esca e, the nut 19 sto sing the iston 16 and the ownwar stroke on striking-the upper edge of the cylinder 15. By adjusting the nut on the lower position of the plate 17 can be regulated soas to limit the length of the. stroke for removing the mold for a given patternplat; to-the amount strictly necessary. intended for a smaller output or is of smaller size than the preceding one. The cylinder 15 of the piston l6 is cast in one piece with the frame 6. The up er flange of the piston 16*, su porting the p etc 17, the si e, avertical screw 51 passing through an aperture 52 in the frame 6. This screwhas a nut 53 for limiting the length ,of travel, of the mold-removing stroke for each pat-.

tern-plate by striking with its bottom por- 115 tion a lateral projection 56 onvthe cylinder 15. This nut has to receive a nut 54. This nut, together with the half-collar 55, pivoted under the frame 6,

insures a fine adjustment of the amount of 120 compression of the cores or other parts which have to be subjected to double pressure.

This arrangement is similar tothat previously described but the parts are arranged at the side of the piston instead ofbcing' 125 mounted directly upon it. o t

It will be understood that in either construction it is possible'byusing strippingplates to obtain independently of the top compression of the sand by the piston 36 an 130 or removing 7 0 ressure; By means of the parts cariiedjby' it. so 7 the Water from the cylinplate 17. in their ortion of the piston .16

e machine shown in Figures 4 and 5 is is provided at an outside screw-thread o 1 under compression by the piston 16, and consequently a more homogeneous compression of the sand contained in the flask,

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is 1. In a hydraulic molding-press, the combination with a frameforming a table at piston to the its upper part, of an upper turning crosshead mounted upon a column carried by the frame, a cylinder secured to said cross-head, a piston in the said cylinder, screw-sockets on the interior of the piston, a pressure-plate fixed upon the inner socket, a rod fixed upon one of said sockets and guided in a cavity of the cross-head, a cylinder formed with the firstnamed cylinder and located above and in. line with it, a piston in the said second cylinder, a rod connecting this piston of the main cylinder, a hook jointed to the extremity of the turning cross-head, a lower plate carrying the means for removing the mold, and means for causing the said plate to ascend and descend, substantially as described and for the purpose specified.

2. In a hydraulic molding-press, the combination with the frame forming a table at its upper part, of an upper turnin crosshead mounted upon a column carried by the frame, a cylinder connected with the said cross-head, a piston in the said cylinder, screw-sockets on the interior of the piston, a pressure-plate fixed upon the inner socket, a rod fixed upon one of said sockets and guided in a cavity of the crosshead, a cylinder formed with the first-named cylinder and located above and in line with it, a piston in the said second cylinder, a rod uniting this piston to the piston of the main cylindena hook jointedto the extremity of the turning cross-head,- a lower plate carrying the means for removing the mold, a piston carrying the said lower plate, a cylinder for accommodating said piston, a screw-nut upon this piston, an adjustable collar screwed upon the said nut, a divided collar jointed upon the frame and having the upper and lower parts embracing the said collar, and an operating-lever connected with said collar, substantially as described and for the purpose specified? 3. In a molding-machine, the combination with a frame forming a table at its upper part, of a cylinder fixed upon this frame, a piston located in the said cylinder, a plate fixed on the upper part of said piston, rods placed upon the said plate, bolts upon the said plate, supports secured by thesq bolts, and rods seated in these supports and having adjustable heads, substantially as above described and for the purpose specified.

4.111 combination, pattern and mold sup porting means, a pattern having a part movable relative to. the body of the pattern, means above the mold for compressing the sand constituting the mold and means for operating said part ofthe pattern and thereby applying additional compression to a portion only of the lower face of the mold.

5. In combination, a pattern plate, a mold flask mounted thereover, means above the mold for compressing the sand constituting the mold, upwardly movable means below the mold for applying additional compression to a portion'only of the lower face of the mold and lifting means for the mold flask mounted to move With the last mentioned means and adapted to engage the mold flask and move it away from the pattern plate after the additional compression is accomplished.

6, In combination, a pattern plate, a mold flask mounted thereover, means above the mold for compressing the sand constitut ing the mold, upwardly movable means below the mold for applying additional compression to a: portion only of the lower face of the mold and lifting means for the mold flask mounted to move with the'last mentioned means and adapted to engage the mold flask and move it away from the pat tern plate after the additional compression is accomplished and releasable means for stopping the upwardly movable meanswhen the additional compression is-accomplished.

7. A ram and stop means therefor, comprising a cylinder carrying an adjustable stop nut and provided with a lateral engaging ledge and a transversely movable stop member having a pair of inturned edge portions adapted to engage the said ledge 1 and the stop nut.

8. A molding machine comprising in combination, pattern and flask supporting means, a power operated pressure piston above the said means, a vertically movable frame beneath the said means, members mounted upon such frame and extending up through the said means for engaging ortions of the mold and other members mounted upon. such frame and adapted to engage the flask and elevate it when the frame is raised.

In testimony whereof I have hereunto signed my name in the presence of the two subscribed witnesses.

PHILIBERT BONVILLAIN.

Witnesses:

DEAN M. Mason,

J ULIEN EAUERNE.

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