US 1467130 A
Description (OCR text may contain errors)
Sept. 4, 1923. l l.. D. WHITNEY HYDRAULIC PRESS Filed Aug. 28, 1922 2 Sheets-Sheet Y1l Epl Sept. 4, i923. 1,467,130
L.. D. WHITNEY HYDRAULIC PRESS Filed-Aug. 2g, 1922 2 sheets-snaai 2 irl i z M93. i
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Patented Sept. 4, 1923.
Application led August 28, 1922.
To all whom it may concern:
Be it known that I, LESLIE D. IHITNEY, a citizen ot' the United States, residing at the city and county lof San Francisco and State of California, have invented certain new and useful Improvements in Hydraulic Presses, of which the lfollowing is a speciication.
My invention relates to the class of hydraulic presses especially adapted for compressing granular or finely divided material, such, for example, as common salt, into small, hard cakes. y
The object of my V invention is to provide an apparatus ofthe described class which is simple in construction and' rapid and etlicient in operation. To this end I employ a plurality of molds, so mounted as to be successively 'brought into the spheres of action first of the compressing mechanism, and
then of the ejecting mechanism, said com-` pressing and ejecting mechanisms operating simultaneously upon successive molds.
My invention will now be fully described with reference to theaccompanyi'ng drawings, wherein.-v
Fig.l 1 is a side elevation of my press, the,
Huid connections and control valve being omitted. Fig. 2 is a plan view of the sam'e.
Fig. 3 is a vertical section taken on the line 3 3 of Fig. 2, showing the iiuid connections and controlling. means.
Fig. 4 is a sectional plan view taken on the line 4-4 of Fig. 1.
In the drawings, the reference numeral 1 designates a base, from which rise a pair. of fixed supporting columns 2 and 2 carrying a fixed head 3. This head has formed within it a fluid pressure cylinder 4, closed at the top and open at the bottom.y A piston Fig. 3 operates vertically within said cylinder 4, and projects from its lower end through a suitable packing gland 6. Said piston carries a cross head 7, to which 1s secured the upper or compressing die 8. The fixed head 3 also carries a second fluid pressure cylinder 9, above and preferably in vertical alignment with the cylinder4. Said second or upper cylinder is smalle-r in diameter than-the cylinder 4, and is inverted, being closed A at its bottom. A piston l0 yoperates in the vupper cylinder f9, projecting from its upper end through a packing 'gland 11. A cross head 12, Fig. 1, securedto said piston' 10, carries two depending rods v13,
lSerial No. 584,653.
which slide freely in guide bearings 14 in the iXed head 3, and are secured at their lower ends to :the cross head 7, as lshown at 15. The pistons 5 and 10 are thus connected together, and move in unison.
' Fluid, under suitable'pressure is admitted continuously to the upper through a connecting pipe 16, F ig.'3i, vfrom a suitable source, not sho-wn, and normally maintains the upper die 8` inv a position above that shown in the drawings. When the uid, Jfrom the .same source, lis admitted to the lower cylinder 4 throughV a connection 17, and a three-way valve 18 the die 8 is forced downward into the position sho-wn, byreason of the vdiii'erence in effective area of the two pistons 5 and 10; and when the pressure is relieved in the lower .cylinder 4, by turning said valve 18 so that the supply vis out oli and the iiuid in Asaid cylinder 4 is allowed to escape through the discharge outlet 19, the die Y8 isY again elevated bythe pressure inthe. upper cylinder 9. lThus the movement of said die 8 is controlled entirely -by the single valve 18. It should be understood, however, that the three-way valve 18 is herewith illustra-ted merely as a preferred meansV for controlling `the movement of the die 8, and that any other similar or equivalent means for controlling the admission ,ofV the Huid to and its discharge from the ycylinder 4 may be employed. y
The vmold in which the cakes are formed `comprises a cylindrical bushing-20 carried ina horizontal rotatable member or turret 21. Thereare preferably `tour such molds ,in said turret, as shown in Fig. 4, but more or less maybe used-as desired. The turret 21 is rotatably mounted upon the' liXed column 2f, and,i n the presentinsta'nce, is intended to be rotated manually to bring 4the molds 2O successively in alignment "with the die 8. Athrust collar E22, Fig. 3, is secured tothe column 2 above'the uturret.2`l,`and
said turret is normally pressed upward,
against'said collar, by a spring-'23, which allows the turretv to give, in va ,downward direction, in case ift-is not properly positioned when the die 8 descends.
A spider 24 is secured beneath the turret 2l and rotates therewith. Said spider 'car`- ries spindles 25, yuponthe 'upper ends of which are formed or 'securedthelower yor resistingdi'es 26. There is one such 'spindle and die for each mold Q0, the die znormally occupying a position within the leiter pi-,
cylinder 9 tion of the mold, as shown at the left in Fig. 3. The spindles 25 are vertically slidable in the spider 24, and are held in their normal position by springs 27 and thrust collars 28. A fixed rest or 'foot 29 is mounted in the base l, upon which the lower end of each spindle 25 rests when said spindle is in vertical alignment with the upper die 8, so that the thrust is taken by the base l rather than by the spider 24.
The slidable spindles 25 are employed to eject the formed cakes from the molds. For this purpose there is provided a biturcated lever 30, Figs. 3 and 4, fulcrumed at 31 upon the base 1, and having one end connected by a pair of links 32 with the movable cross head 7 of the upper die 8. The other end of said lever 30 carries a. roller 33, which is positioned beneath the lower end of the spindle 25 which is diametrically opposite to the spindle aligned with the upper die 8, as shown in Fig. l and at the right in Fig. 3. Thus when the compressing die 8 moves down, to compress the cake within the mold 20 at the position B in Figs. and 4, the lever 30 causes the opposite spindle 25 to be elevated, as shown, thereby ejecting the formed cake from the mold 2O at the position C.
In the operation of the machine, the uncompressed material is placed in the mold 2O at the position A, Fig. 4, by hand or otherwise, and the turret 2l is rotated to bring the mold thus charged to the position B beneath the upper or compressing die 8. The valve 18, Fig. 3, is then turned to the position shown, to admit iiuid to the lower cylinder 4, thereby forcing said die 8 downwardly and compressing the material, after which said valve is turned to permit the discharge of th'e fluid from said cylinder 4, allowing said die 8 to be elevated by the upper piston l0. In the meantime, a fresh charge of material has been placed in the following mold 20 at the position A. The turret 2l is then rotated a quarter turn, and the operation repeated. When the first mold 20 with the formed cake therein reaches the position C, the operation of the compressing die 8 at B elevates the spindle 25 at C, as shown in Fig. 3, thereby causing its resisting die 26 to eject the previously compressed cake from the mold.
I claim 1. A press comprising a xed support; a rotatable member mounted thereon and provided with a mold; a reciprocative compressing die coacting with said mold from one side as the same is brought into registry therewith by the rotation of said member; a reciprocative resisting die carried by said rotatable member and adapted to coact with said mold from the other side; a fixed mem` ber carried by said support for holding said resisting die in functional compressing position relatively to said mold when the latter is in registry with the compressing die; and means for moving said resisting die to eject a previously compressed mold content when said mold is outl of registry with the compressing die.
2. A press comprising a tiXed support, a rotatable member mounted thereon and having a plurality of molds; a reciprocative compressing die coacting with said molds from one side as each is brought, by the rotation or said member, into registry successively therewith; a plurality of reciprocative resisting dies carried by said rotatable member, each coacting with its respective mold from the other side; a fixed member mounted on said support for holding said resisting dies in functional compressing position relatively to their molds when said molds are in registry with the compressing die; and means for moving said resisting dies when their molds are out of registry with said compression die, to eject a previously compressed content.
3. A press comprising a resiliently mounted rotatable member having a plurality of molds; a compressing die coacting with said molds from one side as each is brought, by the rotation of said member into registry successively therewith; means for reciprocating said compressing die; a plurality of reciprocative spindles carried by said rotatable member; a die carried by each spindle coacting-with the molds from the other side; means independent of said rotatable member for acting on said spindles to hold their dies fixed in their molds when in registry with the compressing die; means acting on said spindles when their dies are out of registry with the compressing die to move said spindles and their dies to eject a previously compressed mold content; and connections between the reciprocating means of the compressing die, and the ejecting means of the resisting dies to operate the latter upon the compressing movement of the former.
4. A press comprising a rotatable member having a plurality of molds; a compressing die coacting with said molds from one side as they are brought successively into registry therewith, a reciprocative member carrying said compressing die; a plurality of reciprocative spindles carried by said rotatable member, each having a resisting die coacting with the respective molds from the other side; a iXed bearing 'acting on said spindles to hold their dies in iiXed position in the molds when in registry with the compressing die, a pivotedv lever bearing at one end under the spindles when their dies are out of registry with the compressing die, and adapted to move said dies to eject a previously compressed mold content; and rods directly connecting the other end of said lever with the reciprocative member 0r the compressing die, and adapted to operate said lever for its ejecting Jfunction upon the compression movement of said compressing die.
5. A press comprising a rotatable resiliently mounted turret having a plurality of molds; a reciprocative piston carrying a compressing die adapted to coact with said molds from one side. as each is brought into registry therewith; a spider carried by said turret; a plurality of spindles resiliently slidable in said spider, each spindle having a resisting die coacting With a respective mold from the other side; a fixed bearing acting on said spindles to hold their dies in 15 previously compressed mold content; and 20` connections with the operating piston of the compressing die to operate the lever for its ej ecting function upon the compressing movement of said piston.
In testimony whereof I have signed my 25 name to this specification.
LESLIE D. WHITNEY.