Improvements in Machines for Moulding Plastic Substances.
Year: 1892

page_text: Date of Application, 1st June, 1892
Complete Specification Left, 28th Feb., 1893-Accepted, 1st June, 1893
PROVISIONAL SPECIFICATION.
Improvements in Machines for Moulding Plastic Substances.
I EMANUEL STAUBER of 27, Schlump, Hamburg in the Empire of Germany,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention for improvements in machines for moulding plastic substances has
for its principal objects to remove all excess of moisture during the pressing
operations, to regulate the compression of the material during the moulding, to
effectually heat the moulds and to cut the moulded substance and remove the cut
parts from the mould, by a single and simple operation.
The plastic material is fed from a hopper into a channel along which it is forced
by a slowly moving plunger, the outer end of which is perforated and covered with
jute so as to allow of the passage of the expressed moisture. The end of this
channel is contracted by an inclined perforated plate at the bottom covered with
jute and by an adjustable inclined plate at the top connected to an arm on which
is a weight that can be slid along the arm to adjust the pressure. The material
when sufficiently solid raises the adjustable plate and passes into the moulds which
are arranged in a chamber so that they can be heated. The ends of the moulds
are mounted in a carriage, that can be raised and lowered in the main frame,
and are provided with pistons prevented from rotating and provided with springs
tending to force the pressed material back. A plate or knife is attached to the
top of the back end of the carriage and when the carriage is lowered severs
the moulded material and prevents fresh material being forced forwards; at the
same time the springs force the cut blocks out of the moulds, and the carriage is
again raised.
Dated this 1st day of June 1892.
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, Agents.
COMPLETE SPECIFICATION.
Improvements in Machines for Moulding Plastic Substances.
1, EMANUEL STAUBER of 27 Schlump, Hamburg, in the Empire of Germany,
Engineer, 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 for improvements in machines for moulding plastic substances
has for its principal objects to remove all excess of moisture during the pressing
operations, to regulate the compression of the material during the moulding and to
effectually heat the moulds.
The plastic material is fed from a hopper into a channel along which it is
forced by a slowly moving plunger the outer end of which is perforated and covered
with jute, so as to allow of the passage of the expressed moisture. The end of
this channel is contracted by an inclined perforated plate at the bottom covered
with jute and by an adjustable inclined plate at the top connected to an arm on
which is a weight that can be slid along the arm to adjust the pressure. The
material when sufficiently solid raises the adjustable plate and passes into the moulds
which are arranged in a chamber so that they can be heated.
In the accompanying sheet of illustrative drawings,
Figure 1 is a longitudinal section of a moulding machine constructed according
to this invention and Figure 2 is a plan of the same.

page_text: The material to be pressed such as turf, artificial manure, clay, and the like
passes from a hopper a into a channel 6 and is there pushed forward by a slowly
moving plunger c, the outer end of which is perforated and covered with jute so
that with each forward movement the material pressed is freed from water which
runs away through the open back of the piston c. At the front end, the channel b
is contracted by the inclined plate d and the adjustable inclined plate f pivoted on
the axis e. The plate d is perforated and covered with jute for the same purpose
as in the case of the piston c. The water runs away through holes underneath it
in the channel. On the axis e, and outside the channel is fitted the lever arm g
on which is adjustably arranged the weight always tending to press the movable
h
plate downwards on the pressed material. By suitably adjusting the weight, the
pressure can be increased or diminished and in consequence the degree of compression
of the pressed material can be regulated. The pressed material meets with
resistance against the movable surface f and can only pass through between the
plates d and when it is able by its consistency to raise the loaded surface.
The material now reaches a number of tubes i which are arranged closely
together across the whole width of the channel. These tubes are situated in a
closed chamber which at the same time serves as a heating chamber to convert
the hydroscopic water of the pressed material into steam. The number and shape
of the tubes i can be varied as required. The steam used for heating enters the
chamber by the pipe and the condensed water passes out by the pipe .
In order to remove the condensed water which the pressed material gives up in
passing through the heated moulding tubes the moulding tubes i are divided by a
partition t. The latter is, throughout its entire length perforated like a sieve and
if necessary covered with a porous material such as jute. The pressed material
passes through the tubes i above the sieve plate t whilst the hydroscopic water
driven off by the steam heating passes off through t and away underneath at u..
By
this arrangement the greater part of the moisture contained in the pressed material
may be extracted leaving a minimum remainder which can be afterwards got rid
of by drying in drying chambers.
In order to heat the material fed into the hopper a
plastic, the hopper a is connected to the steam tube
connection with the steam chamber k round the tubes
turn off cock.
and thus render it more
which is preferably in
and is provided with a
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 machine for pressing plastic material, pressing forward the material over
a perforated surface covered with jute so that with each forward movement the
pressed material is freed from water substantially as described.
2. In a machine for pressing plastic material, regulating the degree of compression
of the pressed material by means of the adjustable plate fregulated by the weight h
substantially as described.
3. In a machine for pressing plastic material, the arrangement for heating the
moulding tubes i, substantially as described.
4. In a machine for pressing plastic material, carrying away the moisture driven
off from the pressed material in the moulding tubes by means of the perforated
partitions or bottom plates t substantially as described.
5. In a machine for pressing plastic material heating the material in the hopper
and thereby increasing its plasticity by connecting the feed hopper a to the steam
supply tube v, substantially as described.
Dated this 28th day of February 1893.
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.