US1736262A - Hydraulic pot press - Google Patents

Description

Nov. 19,1929, .P.HANEL 9 Q .9 1,736,262

HYDRAULIC POT rnEss Filed Nov. 29,1926 :s Sheets-Sheet 1 No 19, 1929. I P. ANEI;

HYDRAULIC POT PRESS I Filed Nov. 29; 1926 3 Sheets-Sheet 2 Fatented Nov 19 1929 PAUL HKNEL, OF DRESDEN-A, GERMANY HYDRAULIC POT PRESS Application filed November 29, 1926, Serial No. 151,511, and in Germany December 15, 1925.

My invention refers to so called hydralic pot presses for removing the oilfrom cocoa powder and for other similar purposes; In these presses several sets of press pots which are open on two sides, and plunger like press heads which are consistent with intermediate guiding plates, are piled the one upon the other along vertical guiding bars so as to form a vertical column between a lower hydraulic pressand an upper cross head. For the op- 15 press pots by the hydraulic press. For charging and discharging the press pots the different sets are distanced from each other and the press pots are removed of the machine by sliding them laterally.

It is the purpose of my present invention to relieve the considerable work of repeated screwing and unscrewing each single set of the hydraulic press by providing automatically acting springs between the diiferent pieces of the different sets of press pots all those springs being set to Work or released by a common regulating device with a hand wheel.

In the drawings wherein I have shown a preferred embodiment of the invention, and

in which similar reference characters designate corresponding parts throughout the several views,-

Figure 1 is a vertical longitudinal section of a press constructed in accordance with my 3:, invention taken substantially on the line 11- similar to Fig. 1, showing the press pots in closedposition 1 Fig. 4 is also a vertical section similar to Y Fig. 1 showing the relative positions of the parts at the end of the pressing operation;

Fig. 5 is a like vertical sectional view showing the relative positions of the parts after the hydraulically operated means has returned to normal postion and the press cakes I ha e been ejected from the pots, and

Fig. 6 is a detail sectional view of a slightly modified form of a part of the machine.

In the embodiment of my invention shown in the drawings the socle 22 containing the hydraulic press 23 is connected with the cross head 24 by uprights 25, the shoulders 26 of which limit the downward sway of the intermediate plates 27 and 27 bearing the press heads 28 and 28 whereas the plate 27 with the press head 28 rests directly on the hydraulic press 23. The coiled springs 29, subject to pressure tension, are inserted between the fiangeof the intermediate plates 27*, 27", 27 and the slide blocks 30 of the press pots 31, 31 and 31 As however in this case the springs 29 are inserted between the press heads and the press pots of the same set, they act so as to press each press pot with its upper cover plate against the lower fact of the next higher press set respectively against the upper cross head of the machine. This arrangement has the advantage that the pressing actuation of the hydraulic press on the columns of the pot press sets compresses likewise the coiled springs 29, so that the latterincrease at the same time the tightening pressure between each press pot and the next higher intermediate plate. The vertical pressure rods 32 are arranged in the central plane of the machine, said rods having a number of shoulders 33 limiting the upward movement of the slide blocks'with the press pots. These. rods also serve-for adjusting the press pots to the right position with reference to the press top before startingwork with the machine. To this end the lower ends of the pressure rods are provided with slots 34 and on the lateral flanges of the lowest intermediate plate 27 a there are slidable bolts 35, which if passed through the said slots 34 secure the right position of the rods 32, whereupon the bolts may again be drawn out of the said slots, so as to give the rods freedom for their working movements, which theyj."v perform when the machine is actuated. The reciprocating shifting of the bolts 35 is done by the means of a rack and crank, device 36, indicated in the figures by dotted lines. The upper ends of thepressure rods 32 are shaped asplunger pistons 37 which slide in the cylinders 38, free as longas the hydraulic press 23 is W01king on the press sets, whereas when the hydraulic press has fiinished its work and releases the press sets, the plunger pistons 37 are driven downwardly by hydraulic pressure coming through the conduits 39.

Now as to the working process ofthe machine, Figure 1 shows the position of all parts ready for starting the work: the press pots are filled and inserted into their slide blocks and are held in suspension by the tensioned springs 29; they cannot touch the next higher intermediary plate, because their slide blocks 30 are held down by the shoulders, 33, the pressure rods 32 being held down by hydraulic pressure in the cylinders 38. The machine startsworking by releasing the pressure out of conduit 39 and cylinders 38. The tension of the springs 29 is thus allowed to lift the slide blocks 30 with the press pots, pressing the latter tight against the next higher intermediate plate respectively against the cross head, as it is shown. in Figure 3. The hydraulic press 23 starts work and presses the press heads 28", 28", 28, into the press pots 31, 31 31 compressing at the same time the springs 29, so that they help to press the press pots tighter to the next higher intermediate plate, respectively to the cross head, as it is shown in the Figure v4:. The squeezing process then being finished the bolts 35 are withdrawn from the slots of the pressing rods, the hydraulic press 23 is discharged, but pressure is given through the conduits 39 to the plunger piston cylinders 38, which presses down the pressure rods. The press pots are engaged by the shoulders of the pressure rods and are pulled down likewise over the press heads until the latter press the press cakes out of the press pots, as it is shown in Fig. 5. Then the press cakes are removed, the parts of the machine are brought into the position of Figure 1 with empty press pots however, the press pots are pulled out laterally in the slides of the slide blocks 30, to be refilled and reblocks and having shoulders bearing against said blocks, so as to pressthe press p ots away from the next higher intermediate plates, means for controlling the movement of the said pressure rods; means for temporarily locking the pressure rods with the lowermost of the intermediate plates.

2. In a hydraulic pot press a plurality of press pots and a press head cooperatively associated with each pot, said press pots and heads alternating with each other in vertically superposed relation, said press heads having guidingfianges at opposite sides thereof, a single guide rod at each side of the press pots and press heads movable with and independently of the latter, coiled springs arranged between each of the press pots and the guiding flanges of the next lower" press head, an hydraulic press for moving the press heads into the respective press pots the said guide rods partaking of such movement, an additional means for moving the guide rods in the opposite direction, said guide rods and the press pots having cooperating parts whereby the press pots are moved downwardly upon the respective press heads to eject the press cake from the pot.

' In testimony that I claim the foregoing as my invention, and have signed my name hereto.

PAUL HANEL.

entered into the machine, whereupon the working process can start again.

Figure 6 shows a modification of the driving means of the pressure rods, according to which modification the upper ends 40 of the pressure rods 32 are connected by a traverse 41 which. is connected with the reciprocating rod and hydraulic piston 42. This construction has the advantage of insuring equal movement for the pressure rods on both sides of the machine.

I claim:

1. In a hydraulic pot press the combination of: a hydraulic press; a press head; a plurality of press pots with sliding blocks; intermediate plates having press heads for the press pots and having lateral guiding flanges; coiled springs inserted between the

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