Improvements in Hydraulic Presses for Use in the Manufacture of Blocks of Artificial Stone and the like.
Year: 1899

page_text: Date of Application, 1st Dec., 1899-Accepted, 6th Jan., 1900
Improvements in Hydraulic Presses for Use in the Manufacture of
Blocks of Artificial Stone and the like.
We, CARL CZERNY, of Unter Themenau, Lower-Austria, Managing Director,
and CARL SCHLIMP, of 17, Seilergasse, Vienna I, in the Empire of Austria, Manu-
facturer, do hereby declare the nature of this invention and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement;-
This invention relates to hydraulic presses for making blocks of artificial
stone and the like from pulverulent material, such as clay or the like by com-
pressing the same in its dry state, and the object of the said invention is to
so construct the machine as to render it entirely automatic, and secure and quick
in operation.
In the accompanying drawing
'
Figure 1 is a side-elevation, partly in vertical section of a press constructed
in accordance with this invention.
Figure 2 is a front-elevation, partly in section, and
Figure 3 is a portion of a rear view of the same.
1 is an hydraulic cylinder; 2 is the piston or plunger; is the moulding
plunger attached to the hydraulic plunger; 4 is the head of the press; 5 is the
reciprocating die block which is integral with or rigidly connected to a feed
box 6 open at the top and bottom and adapted to be reciprocated between the
table 10 and press-head 4 as hereinafter described.
7 is a tube for feeding the material to the feed box 6; 9 is a mould box open
at the top and bottom and adapted to move up and down upon the moulding
plunger 3.
The reciprocating motion is imparted to the die block 5 and the feed box 6
by means of a connecting link 11 pivoted at one end to said feed, box and at
its opposite end to a lever 12 pivoted at 22 to the frame of the press. This
lever is provided with a roller engaging a cam groove or slot 13 in a toothed-
wheel 14 which latter is driven by a pinion 15 upon a driving shaft 16 provided
with a driving pulley 17. The toothed-wheel 14 is fast on the shaft 18 and this
latter is also provided with cams 26 27 and 28 for actuating rods 23, 24 and 25
respectively in connection with the water-pressure and discharge valves of the
hydraulic cylinder 1. The mould box receives motion from a lever 20 operated
by cam-pieces 19 provided on the wheel 14. The plunger 2 is furnished with
weights 29 and 30.
The improved press operates as follows;
The space enclosed by the mould box 9 with the moulding plunger 3 at bottom
thereof is filled with material such for instance as clay-powder or the like and
the reciprocating die block 5 is exactly above the mould as shown in Figure 1.
When the pulley 17 is turned in the direction indicated by the arrow the
cam 19 and lever 20 cause the mould box to move slightly upward thereby caus-
ing the upper edge of the mould to pass over the lower edge of the reciprocating
die block 5 and thus completely enclose the material in the space 8. At that

page_text: moment one of the cams 26, 27, 28 operates to cause water at a comparatively
low-pressure to enter the cylinder 1 so as to act upon the plunger 2 in order
to give the material a preliminary pressure. Thereupon another of the cams
operates to allow high pressure water to enter the cylinder 1 (while the low
pressure current is cut off) and so effect the complete compression of the material.
When the compression is completed the third cam, opens the discharge valve
in the cylinder 1 so as to enable the plunger 2 to return to its original position,
the downward motion of the latter being accelerated by the weights 29, 30
suspended from the said plunger.
The mould box 9 at the same time moves slightly downwards owing to the
lever 20 being disengaged from the cam 19. The connecting-link 11 together
with the lever 12 having its roller engaged in the curved groove 13 of the
wheel 14 now withdraws the reciprocating die block 5 with the feed box 6, which
latter had thus far been kept stationary beneath the filling-tube 7 to receive a
fresh charge of material. The movement of the box between the press-head 4
and the table 10, takes place toward the right hand side of Figure 1, to such
an extent as to bring the depending checks 21 of the reciprocating die block
adjacent to the upper edges of two opposite sides of the mould 9 and thus pre-
vent this latter being moved upwards and also to uncover the upper end of the
mould. The cams now again adınit low pressure water to the cylinder 1 in
order to raise the plunger 2 so as to bring the upper edge of the moulding
plunger 3 to the same level as the upper edge of the mould box 9 and
thus remove the compressed stone, brick or the like therefrom. The recipro-
cating die block 5 with the feed box 6 is now moved toward the left of Figure 1
by the connecting link 11 and lever 12, until the box 6 is above the mould 9,
thereby pushing the previously compressed stone or the like along the table 10
to be removed by an attendant. At the same time the water in the cylinder 1
is discharged, the plunger 2 moves downward and lowers the moulding plunger
which allows the material from the box 6 to drop into the space 8, formed by
the mould 9 and the upper part of the moulding plunger 3 and to fill the said
space. The reciprocating die block 5 Figure 1 again moves towards the right
into the position shown in Figure 1 and the cycle of operation as herein before
described is again repeated so as to form a second block and so forth.
The high pressure current for operating the press is advantageously obtained
from an accumulator. It will be noticed that the improved press operates
entirely in an automatic manner and does not require special attention while
ensuring a considerable out-put. Obviously instead of having but one mould 9
with lower moulding plunger 3, reciprocating die block 5 and feed box 6 a
- number of these parts may be arranged in series or side by side and they may
be operated by a single hydraulic cylinder 1, or several cylinders under the
control of a common mechanism 11, 12, 13, 26, 27, 28 may be used.
Having now particularly described and ascertained the nature of our said in-
vention, and in what manner the same is to be performed, we declare that what
we claim is:-
1. An hydraulic press for manufacturing blocks of artificial stone, bricks or
the like, characterized by the fact that the box 6, filled with pulverulent material
from a stationary supply tube 7, is connected to the reciprocating die block 5
which box and die block are guided between a stationary table 10 and the press-
head 4. and adapted to serve on open mould box 9 closed at bottom by the mould-
ing plunger 3 operated by the plunger 2 of an hydraulic cylinder 1, the said
parts being arranged to operate together in such a manner as to first place the
feed box over the mould 9 to fill the latter, then move the reciprocating die
block 5 into position above the mould 9, then to raise the mould slightly higher
than the lower edge of the said die block, then raise the moulding plunger and
compress the material, then slightly lower the mould and the moulding plunger,
then remove the reciprocating 'die block from the mould, then raise the moulding

page_text: plunger so as to push the compressed, stone or the like from the mould and
finally move forward the die block with the box 6 for pushing the stone along
the table 10 and placing the box 6 above the mould 9.
2. In a press as claimed in Claim 1, a shaft 18 provided with cams (14, 19,
26, 27, 28) fast thereon and levers and bars (12, 11, 20, 23, 24, 25) adapted to
operate the reciprocating die block 5 with box 6 mould 9 and also the admission
and discharge valves of the hydraulic cylinder 1, substantially as hereinbefore
described.
3. In the press claimed in Claim 1, the arrangement of reciprocating die
block 5 furnished with cheeks 21 adapted to be placed above the mould 9 while
the compressed stone is being ejected therefrom and to prevent the mould moving
upward.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicants.