Improvements in Sand Moulding Machines.
Year: 1888

page_text: Date of Application, 7th Aug., 1888
Complete Specification Left, 7th May, 1889-Accepted, 22nd June, 1889
PROVISIONAL SPECIFICATION.
Improvements in Sand Moulding Machines.
I, FREDERICK GEORGE LEEDER, Foundry Manager to the Singer Manufacturing
Company, Kilbowie, Dumbartonshire do hereby declare the nature of this invention
to be as follows :-
This Invention relates to machines for making sand moulds for casting and it has
for its object to economise time and labour in making the moulds, whilst enabling
moulds of simple kind to be produced in a complete form in a single machine instead
of as heretofore being composed of parts made in separate machines or at separate
operations in the same machine.
In the improved machine the pattern is formed or fitted in part upon the upper
side and in part upon the lower side of a pattern plate which constitutes a parting
or mould boxes
plate and the mould is formed in sand contained in two "flasks"
placed one over and the other under the pattern plate the sand being pressed within
the mould boxes by the action of hydraulic rams which also serve upon the removal
of the pattern plate to eject the sand moulds from the mould boxes. The machine
comprises a fraining composed of a base piece carrying two hydraulic rams, two or
more vertical guide rods or pillars and an entablature or top plate connected to the
pillars and serving to resist the pressure of the rams when pressing the sand. The
bydraulic rams (of which there may be one two or more pairs) according to the size
of the machine are placed one within the other, the plunger of the outer one serving
as a cylinder for the inner one, and on the outer ram head is fitted the usual platen
The mould boxes are fitted to
on which is fixed the lower flask or mould box.
slide on the guide rods or pillars and the pattern plate which is situated between the
upper and lower box is centred or pivotted on one of the pillars so that it may be
swung out of the way or into position between the mould boxes for forming the mould.
The lower mould box is filled with sand whilst the rams are down, and the pattern
plate swung out the upper box being swung out of the way by means of chains
passing over pulleys on a rock shaft provided with a lever handle. The pattern plate
is then swung into position and the upper box lowered on to it and filled with sand.
The rams are then raised by operating on lever handles which admit water to the
ram cylinders the mould boxes and pattern plate, which is between them, being
pressed up against the entablature whilst the platen underneath and a central boss
in the entablature above serve to press the sand over the pattern or patterns or both
sides of the pattern plate. The rams are then dropped the lower mould box dropping
with the platen whilst the upper box is retained by a notch or catch and the pattern
plate slips down to a mid position in which it is clear of both boxes and may he
swung out of the way. The upper box is then lowered, or the lower one raised, to
bring the parts of the mould together and the inner ram put into action to press up
and eject the sand mould from the boxes which are slightly tapered to facilitate this
operation.
1000
Dated this Fourth day of August 1888.
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow, Agents.

page_text: COMPLETE SPECIFICATION.
Improvements in Sand Moulding Machines.
1, FREDERICK GEORGE LEEDER; Foundry Manager to the Singer Manufacturing
Company, Kilbowie, 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 machines for making sand moulds for casting and it has
for its object to economise time and labour in making the moulds, whilst enabling
moulds of simple kind to be produced in a complete form in a single machine instead
of as heretofore being composed of parts made in separate machines or at separate
operations and in several pieces in the same machine.
In the improved machine the pattern is formed or fitted in part upon the upper
side and in part upon the lower sile of a pattern plate which constitutes a parting
plate and the mould is formed in sand contained in two "flasks" or mould boxes
placed one over and the other under the pattern plate the sand being pressed within
the mould boxes by the action of hydraulic rams which also serve upon the removal.
of the pattern plate to eject the sand moulds from the mould boxes.
In the accompanying drawings figure 1 is a vertical section of the machine;
figure 2-is a front-elevation; figure-3-an-end-elevation-; figure 4. a plan and figure 5
a horizontal section at the line in figure 3.
As represented in these drawings the improved machine comprises a framing
composed of a base piece A carrying two hydraulic rams B and two or more
vertical guide rods or pillars D D and an entablature or top plate E connected to the
pillars D and serving to resist the pressure of the rams when pressing the sand. The
hydraulic rams (of which there may be one two or more pairs according to the size
of the machine) are placed the one B within the other C, the plunger c. of the outer
one C, serving as a cylinder for the inner one B. The funer ram terminates at its
upper end in a platen F and on the outer ram is fitted a head or platen G¹ on which
is fixed the lower flask or mould box G to which the platen F serves as a movable
bottom plate. The mould boxes G and. H are provided with guide brackets g and h
fitted to slide on the guide rods or pillars D D, and the pattern plate I which is.
situated between the upper and lower boxes is centred or pivotted on one of the
pillars D or as shewn on a separate pillar D¹ so that it may be swang horizontally out
of the way or into position between the mould boxes for forming the mould-The
lower mould box is filled with sand whilst the rams B, C, are down. a loose carrying
board or plate being laid on the top of the platen F, and the pattern plate swung ont
to the position indicated at figure 5 the upper box being lifted out of the way by
means of chains j attached to it and passing over pulleys Jon a rock shaft K provided
with a lever handle L-The pattern plate is then swung into the position indicated
at figure 3 between the boxes and the upper box lowered on to it and filled with
sand The rams are thereafter raised by operating lever handles M, N which are
fitted to cocks m n on pipes m³ n' which admit water to the ram cylinders B C-
The mould boxes G, H and pattern plate which is between them, are by this
means pressed up against the entablature E whilst the platen F underneath and a
central boss e in the entablature above serve to press the sand over the pattern.or
patterns on both sides of the pattern plate I-Tho rams are then dropped by reversing.
the cocks m n by means of the levers M, N the lower mould box G dropping with
the head G and platen F whilst the upper box H is retained by a pawl p engaging
a ratchet wheel P on the rock shaft K and the pattern plate I slips down to a mid
position as shown in the drawings in which it is clear of both boxes G and H and
may be swung out of the way-The upper box H is then lowered by releasing the
pawl p by means of a lever p¹, or the lower box G raised to bring the parts of
the mould together, and water admitted by opening the cock N to lift the inner
ram B whereby the platen F presses up and ejects the sand mould from the boxes GH,
which are slightly tapered to facilitate this operation, leaving the complete mould
free on the loose board or plate ready for removal and casting.

page_text: The rams B C in lieu of being actuated by water pressure may obviously be worked
by means of steam compressed air or other fluid under pressure.
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. A sand moulding machine constructed and operating substantially as described
to produce a complete mould ready for casting.
2. A sand moulding machine composed of the following elements arranged and
operating in combination as follows, the framing A carrying hydraulic rams B, C,
one placed within the other, a head on the ram B to which is attached a lower inould
box G and a platen on the ram Cadapted to enter said mould box, a pattern plate I
fitted to swing horizontally out or into position between the mould box G and an
upper mould box H and to slide vertically in guides with said boxes, and a resisting
plate or entablature E adapted to resist the pressure of the rams upon sand
compressed within the mould boxes on both sides of the pattern plate substantially as
described.
3. In a sand moulding machine the framing A carrying hydraulic rains B, C, and
a pressure resisting plate E in conjunction with the flasks or mond boxes G H fitted
to slide on guides D D and a pattern plate 1 adapted to be placed between said boxes
to form a mould in sand compressed within said boxes by pressure of the rams
substantially as described.
4. In a sand moulding machine the combination of the vertically guided mould
hoxes G H a pattern plate free to be swung borizontally out or into position between
said boxes and to slide vertically with the mould boxes, and rams, as B C, adapted
to apply pressure to sand placed in said boxes against a resisting plate substantially
as described.
5. In a sand moulding machine the arrangement in combination of the hydraulic
rains BC fitted one within the other one ram being provided with a platen fitted
within a mould box carried by the other ram and being adapted to eject from the
box the sand mould produced in the machine by the exertion of pressure of both rams
substantially as described.
Dated this Sixth day of May 1889.
CRUIKSHANK & FAIRWEATHER.
62, St. Vincent Street, Glasgow, Agents.