Year: 1888

page_text: We, BERNHARD SCHUCHARDT and HEINRICH SCHÜTTE trading together as
Schuchardt & Schütte, of 5, Molkenmarkt, Berlin, Germany, Merchants and
Manufacturers, 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 consists of the improvements herein described in machines for
making sand-moulds for metal castings which we will describe by referring to the
accompanying drawings which illustrate a machine embodying our improvements.
Fig. 1 is a front elevation, Fig. 2 a side elevation and Fig. 3 a part sectional
plan of the said moulding machine. Figs. 4, 5 and 6 are cross sectional elevations
of the same illustrating the operation of the mechanism and Fig. 7 is a plan and
elevation of a moulding box and frame for the same.
The same letters of reference indicate the same parts in all the Figures.
An
A is the framework of the machine which supports the various moving parts.
B is a horizontal table having an upper plate B¹ for carrying the pattern or patterns
and the moulding box and provided underneath with the two vertical guide rods
cc which are free to move up or down in the bearings a in the frame A.
up and down motion of the table B is obtained by the hand lever D at one side of
the machine which is fixed at one end of the rocking shaft or press beam E under-
neath the table this rocking shaft being cast with a cam e¹ which is in the form of
an upwardly projecting pipe on which rests the lower cupped end f¹ of the
connecting bar F; the upper end 2 of the connecting bar F fits in a socket hole
underneath the table B. The rocking shaft or press beam E has two inverted
U-shaped recesses e³ underneath where it rests and turns on the upwardly projecting
bearers gl g² fixed to the base of the machine. H is the press plate, flat underneath
and made strong enough to resist the pressure of raming up the pattern in the
mould, extending across and above the table from side to side and carried by the
two side rods I¹ I2 which are hinged at their lower ends to the frame A. The
upper parts of the rods 11 I² are screw threaded and pass through bosses h¹ at each

page_text: side of the press plate. By adjusting the position of the nuts j on the rods I¹ I'
the height of the press plate H above the table B can be regulated as may be required.
To enable the box and mould to be removed from or placed on the table the press
plate H with its side rods can be pushed backwards on the hinged ends to the
position shewn by the dotted lines where they are maintained by adjustable screwed
stops. The side rods I' I are assisted in regaining and kept in their vertical
position by the two coiled springs 12 which are fixed to the frame A their free
ends acting on the projecting pins ³ fixed to the side rods I¹ I².
The parts above described constitute the mechanism for making the sand-mould.
We will now describe the mechanism for rapping the upper plate of the table to
loosen the pattern in the mould and for lifting the moulding box and mould off the
pattern and automatically maintaining the moulding box in its lifted position ready
to be removed which mechanism is entirely independent from the mechanism above
described for making the mould.
The knocking out or rapping mechanism consists of a lever having three arms
marked respectively m² m² m³ free to turn on the shaft N carried by the frame A.
The arms m² m² are weighted and when the table is in its lowest position (see Figs. 1,
2 and 6) and the three-armed lever is shaken by grasping the handle m³ either one
or other of the weighted arms m¹ m² will strike the projections oo provided on the
upper plate or table and thus loosen the pattern Y in the mould.
The said moulding box lifting mechanism consists of the vertical slide P free to
move up or down in the bearings a³ at in the frame A. This slide is by preference
made rectangular in cross section to prevent it from turning. Fixed to this slide
is a cross casting Q having fixed to the outer end of each of its arms a pillar which
four pillars are marked respectively R¹ R2 R3 R4. In the upper end of each of these
pillars is a set screw by which the combined length of the pillars and set screws
can be regulated.
The vertical slide P with its cross casting Q and pillars is lifted and maintained
in its lifted position or lowered by the hand lever S fixed on the shaft N turning in
the bearings t. On the inner end of the shaft N is fixed the crank disc U provided
with a crank pin u¹ on which is jointed the connecting rod u² the lower end of which
is jointed on a pin p fixed to the slide P. When the slide P is in its lowest position
(see Figs. 1, 2, 4, 5 and 5*) the hand lever S is about horizontal and the crank pin u¹
on its bottom centre. On turning the hand lever S upwardly the slide P is raised
and the set screws r at the top of the pillars strike and lift the box and when the
handle lever has been turned through a little more than half a revolution the crank-
pin u' has just past its dead point and in this manner automatically fixes the lifted
box. Suitable means are provided for preventing the hand lever moving too far
such as a pin u³ on the crank disc U which comes into contact with the connecting
rod u² (see Fig. 5**).
The roulding box V is a rough un-machined casting (shewn by dotted lines in
Fig. 7) which during the moulding process is secured in the outer frame W, which
is rather larger than the box V by the four set screws w³ passing through the sides of
the frame. The outer frame W is provided with bosses w² for the set screws on the
pillars R¹ R² R³ R₁ to strike against and there is a vertical hole w³ bored in opposite
sides of the outer frame W which, when the frame W is in position on the table of
the machine, fit on to corresponding turned pins x x fixed to and projecting upwardly
from the table thus securing the box in position during the moulding process. We
• prefer to employ together a pair of the machines above described one machine being
continuously employed in making moulds in top boxes and the other in making moulds
in bottom boxes.
The operation of the machine above described is as follows:-The table B being in
its lowest position, (see Figs. 1, 2 and 4) the pressure plate H is pushed back as
shewn by dotted lines Fig. 2. The box V, secured by the screws w¹ in its outer
frame W, is now placed on the top plate B' of the table to which the pattern (such
as the lever Y) is fixed, the pins a, a, fitting in the holes 3 and keeping the box in
. place. The box V having been filled with sand and slaked off, (see Fig.4) the usual

page_text: wooden packing block Z is placed on the top of the sand, the lever Dis now depressed
thus turning the rocking shaft or press beam E and causing the cam e² to operate
through the bar F and press the block V against the pressure plato to ram the sand
round the pattern and form the mould, the weight d on the lever D assisting in this.
On the lever D being raised to its original position, the table, box and mould descend,
the pressure plate His now swung backwardly as shewn by Fig. 6 so as to allow the
box mould and its outer frame to be removed. The top plate B having been rapped
as above described by shaking the lever m³ the hand lever S is turned half round as
above described thereby raising the slide P, cross Q and pillars R¹ R2 R3 R4 which
strike the frame W and lift it and the box and mould off the pattern (see Fig. 6)
and by the crank pin u¹ passing its dead point as above described keep them raised
after the hand lever has been released. The frame box and mould are then lifted off
and the top and bottom boxes (having been moulded in separate machines) are placed
together with their frames W; the frames are then taken off by slackening the set
screws w¹ thus leaving the boxes together which are then cast without any
connection. The frames W are then used with other moulding boxes as above
described.
Having now particularly described and ascertained the nature of our said invention,
and in what manner the same is to be performed, we declare that what we claim is:
1st. In a moulding machine the hereinbefore described arrangement of mechanism
for pressing the sand to form the moulds, consisting of the moulding table guided
vertically and moveable upwards, the adjustably weighted hand lever operating the
rocking shaft or press beam, the vertical pressure-bar connecting the press beam to
the table, and the adjustable pressure plate carried above the table and hinged
suitably for back movement, these parts being connected and arranged together for
joint operation substantially as hereinbefore set forth and illustrated.
2nd. In a sand moulding machine the hereinbefore described arrangement of
mechanism for lifting off the moulding boxes, consisting of the vertically movable
cross guided by slide bar with adjustable pillars, in combination with the
arrangement of hand lever and crank movement so arranged that by a half turn of
the hand lever the box is raised and the crank strikes a little beyond the dead point
thus automatically fixing the lifted box in this position, substantially as hereinbefore
set forth and illustrated by the accompanying drawings.
3rd. In a moulding machine the herein before described rapping or knocking-out
apparatus consisting of the lever m² m² m³ which by a hand movement raps the upper
plate, as herein before set forth.
4th. The general combination and arrangement of parts constituting the improved
moulding machine arranged to operate as hereinbefore described and illustrated by
the accompanying drawings.
5th. With a moulding machine, the employment of rough unbored moulding boxes
which in the moulding are secured, substantially as set forth, in an outer frame
arranged to fit the machine table and adapted to fit with another similar box and
frame, so that when the frames and boxes are placed one above the other the frames
can be removed and the boxes cast without any connection, substantially as
set forth.
Dated this 14th day of August 1888.