Improvements in Apparatus for Moulding and Pressing Dry Materials.
Year: 1897

page_text: Date of Application, 29th Dec., 1897-Accepted, 29th Dec., 1898
COMPLETE SPECIFICATION.
Improvements in Apparatus for Moulding and Pressing Dry
Materials.
I, CLARA LUCKE, trading under the Firm of C. Lucke, of Eilenburg, Saxony,
Empire of Germany, Manufacturer, do hereby declare the nature of this inven
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:-
The present invention relates to presses for moulding and pressing dry materials,
such as starch, coal dust and other materials. The invention consists in con-
structing the press so as to enable the material being worked to be subjected
successively to varying pressures by one and the same die, i.e. the pressure of the
die or dies on the material under treatment is increased towards the end of the
downward stroke of the said die. The invention further comprises means for
connecting the operating die or dies with an hydraulic accumulator and means
in connecting with the latter to limit the amounts of both pressures to a certain
extent according to requirement.
And in order to render the present specification more easily intelligible reference
is had to the accompanying drawing in which similar letters of reference denote
similar parts throughout the several views:-
Fig. 1 is a front elevation of a machine comprising the present. improvements,
the dies and pressure pistons being shewn in section, and
Fig. 2 is a side elevation showing the feed device in section.
It should be remarked in connection with the accompanying drawings that all
parts not directly connected with and essential to the present invention have
been omitted entirely, or only shown in so far as the same are necessary to the
operation of the machine, the description, as far as such relatively unimportant
parts are concerned, being confined to what is absolutely necessary in order to
avoid prolixity of the specification.
A horizontal disc f is mounted in suitable bearing f supported on a standard
of the frame u¹ u² u³ u¹ of the machine and intermittently rotated by suitable
known means from the driving mechanism of the machine. This disc carries one
or more interchangeable dies or moulds be one of which is shown in section at
Figure 1, said moulds being situated in regard to the centre of the disc so as
to successively pass between the dies and d At a suitable part of the machine
above the disc a feed shute b leads to a housingh mounted on a plate z¹ (Fig. 2)
Within the
between which latter and a lower plate the disc f* rotates.
housing is mounted a feed
or spiral h which is rotated by
he from the main driving shaft n, said bevel
engaging the bevel h' in the main driving shaft. After the mould in the disc f' has
been charged by the feed worm h with the material to be pressed, the said disc
means
of
bevel
a
gear
worni

page_text: This roll is mounted on a shaft having its bearing 58 in an arm 3 of the machine
frame, the other end of the said shaft carrying a roll connected by a strap or
belt (Fig. 2) with a pulley s on the driving shaft n. The latter shaft carries
a sheave pulley m² which may be driven from any suitable source.
As regards the foregoing description, it should be observed that an upper and
lower die are not essential to the invention, one upper die may be employed which
acts on a lower fixed bearing surface in which case the lever system connecting
the upper and lower dies could be omitted and the upper cylinder only would
be connected with the accumulator. Furthermore the accumulator itself is not
absolutely essential. The same could be omitted in the simpler form of the
machine as an increase of pressure will be attained, even where no accumulator,
is employed.
Then again instead of a lower fixed bearing surface, a lower die might be sun-
ported on a column of liquid in direct communication with the accumulator, in
which case a limit of pressure would be attained. Or the upper die might be
similarly arranged.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:
1: In a press for moulding dry materials, the combination of an upper die,
a lower bearing or matrice and means in connection with said upper die for
automatically increasing the pressure on the same at a period intermediate of
its downward stroke, substantially as described.
2: The combination of an upper die, a mould below the same, a lower matrice
and means for sinking said upper die, comprising a rocking lever and means for
rocking the same, a shaft to support said rocking lever and an eccentric inserted
between said lever and shaft and means for rotating the said eccentric, in the
manner and for the purpose substantially as described.
3: The combination of an upper die, a mould and a lower hearing surface, a
cylinder formed in the upper end of said die, a piston in said cylinder and a
rocking lever above said cylinder, means for connecting said cylinder and rock-
ing lever and means for oscillating said rocking lever, an eccentric between said
rocking lever and its supporting shaft and means for rotating the same, a
hydraulic accumulator, means for weighting said piston, and a second weight in
connection therewith, adapted to he raised when the first has been lifted a
certain distance, substantially as described.
4: The combination of an upper die and means for sinking the same, a
mould below said die and a lower die in a line with and below said upper die, a
rock lever above said upper die, a shaft to support same and an eccentric inserted
between said lever and shaft and means for rotating the same, a lever system for
connecting said lower die with the upper one and distributing between the two
dies, equally, the pressure imparted to upper die. substantially as described.
5The combination of an upper die and a lower die, a cylinder to each die,
and pistons in said cylinders. extending at opposite ends of each cylinder, a
rock lever and means for oscillating the same, means for connecting said piston
to the rock lever, a supporting shaft to the said rock lever and an eccentric
inserted between said lever and supporting shaft, a lever system to couple the
piston rod of the lower cylinder with that of the upper one, a hydraulic accumu-
lator and means for connecting the interior of both evlinders with the pressure
space there of a piston to said accumulator and weights suspended in connection
therewith, adapted to be raised by the upward movement of the said piston one
after the other, substantially as described.
6: The combination of an upper die, and means in connection therewith for
imparting to the same a varying pressure during its downward stroke. a lower
matrice and means for supporting the same in connection with a hydraulic
accumulator, means in connection with said accumulator and the upper die to