Improvements in Moulding Machines for Hollow Casting.
Year: 1896

page_text: Date of Application, 8th Sept., 1896-Accepted, 10th Oct., 1896
Improvements in Moulding Machines for Hollow Casting.
A communication by THE EISENHÜTTENWERK MARIENHÜTTE BEI KOTZENAU ACTIEN-
GESELLSCHAFT (vormals SCHLITTGEN & HAASE), of Marienhütte, near Kotzenau,
Silesia, in the Empire of Germany, Iron Manufacturers.
1, WILLIAM PHILLIPS THOMPSON F.C.S., M.I.M.E., of The Agency for Foreign
Patent Solicitors, 6 Lord Street, Liverpool, and 6, Bank Street, Manchester, both in
the County of Lancaster, 118 New treet, Birmingham in the County of Warwick
and 322 High Holborn in the County of Middlesex, Civil 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 relates to a moulding machine for casting hollow articles more
particularly for casting metal pots. The machine is characterised by a new arrange-
ment of the mould plate, and the peculiar construction of the pattern serving for
making the lug or handle mould.
The mould plate is formed as a hollow box open at one or preferably at two
opposite sides. In one bottom of the box shaped moulding plate the core box is
suspendel, whilst the mould pattern with a device for forming the lug or handle
mould projects outwards from the opposite bottom. The mould plate is revolubly
mounted by means of trunnions in a fixed framework or stand, the said trunnions
being arranged on two opposite sides of the box shaped moulding plate, but not
in the centre of these side walls, but in proximity to the end plate which carries
the mould pattern, so that the distance of the axis of rotation from the support
for the core box is considerably greater than the distance between the axis of
rotation and the support (surface) for the mould pattern. By this means the dis-
charging table, by means of which the mould plate of the core and of the mould
is discharged, can assume the same or approximately the same position in height
in both cases, which has the advantage that the up and down movement of the
discharging table is reduced to a minimum. By this comparatively small up and
down movement of the discharging table, the certainty of an exact vertical drawing
off of the mould from the pattern, is considerably increased.
The box-shaped mould plate is, as already mentioned, preferably open at two opposite
sides, namely, the front and rear ones, in order to allow of the mechanism of the
pattern for the lug or handle being easily reached, which mechanism consists
essentially of a circular curved pattern in one piece, and slightly tapered to one
end. At the thickest end of the same, a handle is attached by means of which
the said pattern or print may be drawn through a slot in the mould pattern into
the hollow part of the same.
In the accompanying drawings is shown a form of construction of this moulding or
shaping machine.
The machine frame a carries a box-shaped monld plate c, revolubly mounted by
means of trunnions b, the core box i being suspended at one end of the said plate
whilst the opposite end carries the mould pattern o. A table d free to slide in a vertical
direction is arranged between the standards of the framing and carries beneath the
mould plate on rails a carriage e and may he raised and lowered by means of rack
gearing fg, Figure 3, operated by means of a lever h. In order to keep as sinall as
possible the up and down movement which the discharge table d and therewith the
carriage e shall make, firstly, for the purpose of supporting the mould plate during

page_text: the moulding, and, secondly, for the purpose of withdrawing the mould from the
pattern, the trunnions 6 are arranged at an unequal distance from the two parts of
the mould plate, so that whilst the core box lies sunk within the mould plate, and the
mould pattern on the other hand projects from the same, the outermost parts of the
moulding boxes & and belonging thereto, stand at about equal distances, or
approximately equal distances, from the axis of rotation of the mould plate.
A semi-circular block n is attached internally to the mould pattern o, and a loop
piece p is fastened over the said block, Figures 4 and 5. The groove between the
loop piece p and the block n forins a guide for the semi-circularly shaped curved
pattern or print k which is tapered to one end and which may be pushed to the
outside through a slot in the mould pattern until its tapered end engages in a flat
recess in the outer wall of the mould pattern. The thicker end of the core is
pivolally connected to a handle m, by means of which it may be drawn out of the
sand and guided between the loop p and the block n for the purpose of forming the
print or mould for the handle. By means of a pin q, Figure 4, attached to the mould
pattern, the handle m, which is provided with a suitable hole, and with it. the said
print or pattern may be fixed in its innermost position, Figure 3.
The making of a casting mould is carried out in the following manner :-
After both casting boxes s and t have been placed in position and connected with
the mould plate c by keying in the ordinary manner, the said plate is arranged with the
core box upwards, and the table d is so far raised by reversing the lever that
the carriage e rests against the moulding box s. The mould plate, together with the
mould box which is connected with it, is thus actually supported by the discharging
table and carriage de and the trunnions bare thus relieved of weight. The core is
then rammed in. When this has been done the table d together with the carriage e is
lowered, and the mould plate c is revolved to 180° so that the mould pattern o lies
uppermost. The table d'is then again raised until the carriage e rests against the
mould box t and the mould with the lug or handle is formed, the lug print / being
pushed out, and the runner stick or ingate pattern u, Figure 3, inserted.
The ingate pattern u is then again withdrawn, the connection of the mould box t,
with the mould plate a severed by the removal of the respective keys, and the table d
again lowered by pulling the lever h. The moulded core resting with its moulding
Fox on the carriage, is thus withdrawn fron the core box i, Figure 3.
The core is moved away by means of the carriage e on the extended rails, lifted
off the carriage, and set down, and the mould plate cis again revolved to 180° so that
then the mould box s hangs downwards.
The table dis then raised (together with the carriage e which has been pushed
back into its first position) until the mould box s rests on the carriage e, an'l then,
by means of the handle m, the lug or handle print is drawn out of the moulding
sand, and brought into the position shown in Figures 4 an 1 5 in the interior of the
mould pattern o, the keys which connect the moulding box s with the mould plate c
being then withdrawn, and the mould drawn off the pattern o, Figure 4, by the
table d and its carriage e being lowered. The table is lowered until the mould can be
freely carried away on the carriage e.
The finished mould is then combined with th
previously discharged core to form the casting mould, and the latter is conveyed to
the casting place.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, as communicated to me
by my foreign correspondent, I declare that what I claim is :-
1. A moulding machine for conical hollow casting, consisting of a revoluble mould
plate, formed as a hollow box () and having a core box (i) suspended in one end of
the box, and a mould pattern (o) suspended on the other, and having trunnions ()
arranged so close to the end which carries the mould pattern, that the distance from
the axis of rotation of the mould plate to the outer edge of the moulding box (t)
for the core is equal or approximately equal to that from the said axis of rotation
to the moulding box (s) for the mould substantially as described.

page_text: 2. In a moulding machine such as described, the arrangement of a lug or handle
pattern accessible through the open sides of the box shaped moulding plate, and
consisting of a core or print (k) in one piece, tapered to one end, and provided at the
other with a handle (m), said core or print being adapted to be pushed out and
withdrawn through a slot in the mould pattern (0), substantially as herein before
described.
3. The general construction and combination of parts taken as a whole, forming the
improved moulding machine, substantially as described and illustrated.
Dated this 7th day of September 1896.
WM. P. THOMPSON & Co,
Agents.