IMPROVEMENTS IN MOULDING MACHINES
Year: 1887

page_text: Date of Application, 31st Mar., 1887.
Specification Accepted, 3rd May, 1887.
I, GEORGE GUNTZ, of 21 St. Clement's Street, Wilkes Barre, Luzerne County,
in the state of Pennsylvania, United States of America, Mechanical Engineer,
do hereby declaro the nature of my invention for 'IMPROVEMENTS IN MOULDING
MACHINES and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
32
This invention relates to moulding machines for use in the manufacture of
Car Wheels, and consists in the novel construction and combination of the parts
hereinafter fully described and claimed.
In the drawings:-
Figure 1 is a side view of the machine complete.
Figure 2 is a vertical longitudinal section through the machine, taken on the
line 1, 1, in Figs. 3, 4 and 5.
Figure 3 is an end view of the machine, on the driving gear side.
Figure 4 is a plan view, from above, of the complete machine.
Figure 5 is a vertical transverse section on the line 2, 2, in Fig. 4.
Figure 6 is a detail plan view, from above, of a portion of the revolving table.
Figure 7 is a detail view showing portions of the machine head and table, and
the method of forming the pouring gate.
Figure 8 is a detail plan view of the levers for operating the valves of the sand
reservoir.
Figure 9 is a transverse section through a portion of the table, taken on line 3, 3,
in Fig. 4.
Figure 10 is a detail plan view of the upper clutch for disengaging the driving
mechanism.
Figure 11 is an end view of the same.

page_text: Figure 12 is a section through the clutch taken on the line 4, 4, in Figs. 10 and 11.
Figure 13 is a detail side view of the lever for operating the upper clutch.
Figure 14 is a similar view of the lever for operating the lower clutch.
Figure 15 is a plan view, from below, of the lever shown in Fig. 14.
A frame a is provided, and is securely bolted to a suitable foundation. The head
of the frame is provided with a bolt a', which passes through a plate a², and secures
the anvil ffirmly to the end of the machine frame.
A revoluble table d, provided with a central stem 62, is pivoted upon the pedestal b,
which projects from the frame a, and a ball bearing is formed between the said
pedestal and the table, so that there may be very little friction between them. The
lower side of the table d has a circular flange depending from it, which revolves
in contact with the upper surface of a circular track c, which supports the edges
of the table. The table is also provided with a circular toothed rack d', into which
the bevel wheel e¹ gears, and gives a rotary movement to the table, as will be more
fully described hereinafter. A tight pulley o¹, and a loose pulley o are mounted
on a shaft w¹, journaled in the brackets y, at the rear of the machine, and receive
rotary motion from any suitable line or counter shaft by means of a belt, arranged
in the ordinary manner. A worm w, is secured upon the shaft w¹, and gears
into the worm wheels o and p, which are placed below and above it respectively.
The worm wheel 1, runs loose upon the shaft g³, which is journaled in the
frame and the worm wheel is prevented from slipping off the end of the shaft g³
by the collar p², secured to the shaft.
A shaft g is also journaled in the frame a beneath the shaft g³, and has the
aforesaid bevel wheel c¹ secured upon its end. Gear wheels c2 c2 connect the shafts
gs, and together, and communicate the rotary movement of the driving pulley o¹
to the table d. The said gears c² c², may be ordinary spur wheels, or may be
eccentric wheels, according whether it is desired that the table should move with
a uniform or varying velocity. The motion of the table is rendered automatically
intermittent by means of the clutch q.secured upon the shaft g³.
A clutch pin z having a beveled projection 20, slides in a cross groove formed
in the clutch, and engages with a hole in the hub of the worm wheel p, into which
it is pressed by the spring which is secured to the clutch and bears upon the end
of said pin. A groove is formed in the frame for the spring to revolve in,
so that it is preserved from injury, and is free to act at all times. A circumferential
groove is formed in the clutch. A pivoted lever has a wedges at one end,
which can be dropped into the groove $1. When the clutch revolves, and the wedge
is in the groove the projection on the clutch pin strikes upon the wedge, and the
clutch pin is drawn back against the pressure of the spring 23, until out of gear
with the worm wheel P, which continues to revolve without communicating its
motion to the shaft g³.
The lever is pivoted to the bracket s¹, secured to the frame a, and the tail
of the lever engages with and is operated by the revolving cam r, which is secured
upon the shaft t, journaled in the brackets u, u, also secured to frame a.
A worm wheel v is secured upon the shaft t and receives motion from the worm,
secured upon the end of the shaft w¹.
The worm wheel o also runs loose upon its shaft g, which is provided with the
collar p², to keep the wheel o from slipping off. A clutch 7, is secured to the shaft G,
and is provided with a clutch pin 2, and spring 23 exactly as before described,
as applied to clutch q'. A cam is secured on the lower end of the shaft t, and
is the same as cam, and operates the lever which is pivoted in the same manner
as the lever s³, and is provided with a wedges for disengaging the clutch pin from
the hub of the worm wheel o; the only difference in the levers and being that
the wedges s are placed upon opposite sides. of the pivot, and act in opposite
directions, because the worm wheels p and o turn in opposite directions.
The shaft g3 and g, have their intermittent motions communicated to them
alternately, as will be more fully explained hereinafter.

page_text: The revoluble table d is provided with four or more equidistant holes or chambers,
cach of which is provided with flanges n³ at the bottom which forms guides to
prevent the rams m from turning, and rests for supporting the circular flanged
bushes and the pattern n.
The moulding box for the car wheel may consist of the chill e, which forms the
tread of the wheel. This chill e is provided with guide pins which slip into holes
in the table and hold the chill in its proper position over the ram m.
The chill
is further provided with the lifter el, which consists of a flange bolted to the chill,
and arms or plates depending from the flange to support the sand between the arms
and round the hub of the car wheel, in the said moulding box or chill.
The pattern consists of a central boss to form the hub of the wheel, and an
outer cylinder of the thickness of the rim of the wheel, the said boss and cylinder
being united by arms, as shown in Fig. 4, which arms on the pattern are exactly the
same as the arms of the wheel when cast. A. spindle is screwed centrally into
the boss of the wheel pattern n. The ram m consists of an irregular figure, cored
out for lightness, and having projections fitting the interior portion of the wheel
pattern n, between the arms, as shown by the shaded lines in Figure 4. A central
hole is formed in the ram for the spindle I, and the lower part of the ram is made
to slide between the flanges ³ on the table, so that the ram cannot turn round in
the hole in the table; and as the ram engages with the arms of the wheel pattern n,
the said pattern is held from turning also.
Two rollers are journaled upon pins in the lower part of the ram, the use
of the rollers being to reduce the friction between the ram and the lifting cams j, j,
which will be described hereinafter.
A is the reservoir for the moulding sand. This is shown cylindrical, but may
be of any other convenient shape. It is supported by the brackets S, having feet R²,
bolted securely to the foundation.
The lower end of the reservoir is provided with a conical hopper, terminating
with a circular orifice which exactly coincides with the top of the moulding box
or chill. The reservoir is arranged to come over the table.and fill the moulding box
with sand before the table is turned, so that the said box may come under the anvil f
The reservoir A is provided with a vertically adjustable frame T", having the
valves U journaled in it on the pivots U¹, something like the slats of a blind or
shutter are pivoted. Each valve U has a lever W projecting from it, and each
lever W is pivotally connected to the horizontal lever V so that all the valves
can be opened or closed at once, and by the horizontal movement of lever V.
Jis a bell crank pivoted to an extension of the frame T and pivotally connected
to the lever V, and to the link L. The link L is provided with several holes for
the pivot pin at its upper end, to allow of vertical adjustment.
A fixed frame T is also secured in the reservoir, above the adjustable frame T,
and is provided with pivoted valves, and a horizontal lever for opening them, the
same as before described. J is a bell crank which connects the horizontal lever
of the frame T with a link L².
The horizontal and bell crank levers of the upper valves are not shown in Figure 5,
because, as will be seen on reference to Figure 4 the said levers are arranged
equidistant from and upon opposite sides of the center line of the reservoir, through
which the section shown in Figure 5 is taken.
Qare levers provided with weights R at their free ends. These levers are
pivoted on the pin N in the bracket M, which is securely bolted to the foundation,
and their opposite ends are pivoted to the links L and L' respectively.
Two similar cams are secured on the shaft g, at right angles or thereabouts,
to each other, and each cam operates to lift one of the levers Q.
Prepared moulding sand is placed in the upper part of the reservoir A, and an
empty moulding box is brought under the conical hopper A¹. The revolution
of the shaft y causes the first cam to lift its lever Q, and thereby open the valves U
of the upper frame T, and allow the charge of sand to fall through them and fill

page_text: the space between them and the valves of the lower frame T. The weight R
closes the valves as soon as the cam allows the lever to fall, and the continued
revolution of the shaft g, causes the second cam to lift its lever Q and thereby
open the valves U of the lower frame T', and allow the sand to fall through them
into the mould. The other weight R closes the lower valves to which it is connected,
as before described, concerning the upper valves. The charge of sand being
regulated in amount by the distance between the upper and lower frames, the
lower frame is made adjustable in the following manner :-
The adjustable frame T is provided with arms D which project through slots
in the reservoir; the said slots being provided with cover plates D' which slide
with the arms to prevent the escape of sand. I is a hand wheel mounted upon
a shaft B, having bevel wheels G G, also secured on it, and journaled in brackets H
secured to the top of the reservoir.
CC are twin screws supported by brackets E also secured to the top of the
reservoir. The lower ends of the screws Cengage with the arms D, and the upper
ends are provided with the bevel wheels F F, which gear into the bevel wheels GG,
so that the lower frame T¹ is raised or lowered as far as desired by turning the
hand wheel I.
Two similar cams j, are secured on the shaft g, for raising the ram m, and a third
cam i, is also secured to the shaft between the cams j, for raising the pattern n.
Additional bearings h are secured to the frame a to support the shaft g, on each side
of the cams j.
The ram and pattern are both down as shown in Fig. 2, while under the reservoir A,
so that the whole of the space from the top of the ram to the top of the flange
of the lifter o' is filled with loose sand. The table is then turned by means of the
circular rack and shaft ², until the moulding box or chill is directly under the
anvilf, and the rollers are over the cams j.
The revolution of the shaft y then causes the cams i and j to raise the pattern n
and ram m simultaneously, until they are raised to the full extent, and the sand
is uniformly compressed about them in the moulding box or chill.
The cam then leaves the end of the pin 1, and allows the pattern to descend
slowly by its own weight. The radial portions of cams j, roll upon the rollers k
and hold the ram in its raised position until the descent of the pattern is completed.
The cams, then allow the ram to gradually descend in a similar manner.
The table is then revolved so as to bring another moulding box under the anvil.
The rammed up moulding box is removed from the table when it comes opposite the
reservoir, and is carried to the casting pit. An empty moulding box or chill is placed
on the table in place of the ramined up one just removed before the table comes round
again under the reservoir.
A latch 3 passes through a hole in the frame a, which guides and supports it, and
engages with the hole in the table cach time the moulding box is brought under the
anvil. The other end of the latch is pivoted to the lever h², which is pivoted in
the bracket inside the frame. A spring between the lever and the frame causes
the latch to engage with the holes, air lock the table automatically each time a
moulding box comes under the anvil.
A tappet g projects from the shaft g and strikes the end of the lever just before
the table is ready to commence its rotary movement. This tappet drives back the
latch, holding it until the table has gone far enough for the hole to be clear of it, and
then the latch is allowed to bear upon the rim of the table ready to slip into the next
hole when it comes round.
The operation of every working part of the machine is automatic. The gearing is
arranged so that the upper clutch throws the shaft g³ out of gear, and stops the table
every time a moulding box comes under the anvil, and the table is locked by the latch.
Immediately the table stops, the shaft commences to revolve, the ram and pattern
are raised and lowered as before described, and the next adjacent moulding box receives
its charge of sand from the reservoir.

page_text: This being accomplished, the continued revolution of shaft g raises the latch out of
gear with the table, and at this moment the lower worm wheel is unclutched from the
shaft g by the lower cam acting on the wedge levers. The shaft g remains
stationary; shaft g³ commences to turn and revolves the table as before described.
A second machine is used to form the top part of each mould. This second
machine is exactly like the one described, but instead of a chill being used to form the
moulding box, the top box e3 is used, as shown in Fig. 7. This top box is provided with
cross bars, and a central ringito support the sand in the box. The bush n² is not used;
the ram m fits the hole in the table, and is provided with the rollers k for lifting it,
the same as the rani m previously described. A bead 3, is formed on the head of the
ram and is pressed in the sand, thus forming a pattern for the only remaining part of
the wheel which has to be moulded in the top box. A central spindle is provided
and is worked in the same manner as the spindle 1. The upper end of this spindle
makes an impression in the sand into which the core of the central hole of the hub-is
afterward placed. The spindle I also has the gate pattern secured to it. This gate
pattern is drawn out downwards with the central pin, and the metal for the wheel is
poured through the gate hole made by it after the two parts of the mould have been
clamped together in the casting pit. The pins e², which guided the chill on the table,
serve as guide pins for the top box when the chill is turned over in the casting pit.
Having now particularly described and ascertained the nature of my said invention,
and in what manner the same is to be performed, I declare that what I claim is:
1. In a moulding machine, the combination of a revoluble table having a hole or
chamber provided with guide flanges at the bottom, a moulding box or chill resting on
the table around the hole, a pattern resting on the flanges inside the hole, and provided
with a central stem for raising it, a ram guided and supported by the said flanges, and
fitting the interior of the pattern, and mechanism for raising the said central stem
and ram.
2. In a moulding machine, the combination of a revoluble table having a series of
equidistant holes or chambers provided with guide flanges, moulding boxes resting on
the table around the holes, patterns resting on the flanges inside each hole, and
provided with central stems for raising them, rams guided and supported by the said
Hanges and fitting the interior of each pattern, an anvil rigidly supported above the
table, and mechanism under the table for raising each central stem and the ram, when
brought under the anvil by the revolution of the table.
3. In a moulding machine, the combination of a table having a hole or chamber, a
moulding box resting on the table around the hole, an anvil rigidly supported over
the moulding box, the pattern provided with a central stem for raising it, guided in the
hole in the table, a raui fitting the interior of the pattern a revolving cam under the
central stem for raising pattern, and a revolving cam or cams, under the ram for
raising and holding it raised up until the pattern has descended to its original position.
4. In a moulding machine, the combination of a revoluble table having a hole or
chamber provided with guide flanges n³, the moulding box or chill e, the lifter secured
to the said box, a fixed anvil above the moulding box, the pattern n supported by the
said flanges and provided with a central stem, the ram m fitting the interior of the
pattern and provided with rollers &, the revolving cam i for raising the pattern, and
the revolving cams j, bearing on the said rollers, for raising the ram when under the
anvil and holding it raised up until the pattern has descended to its original position.
5. In a moulding machine, the combination of a reservoir for sand, two frames, each
provided with a series of pivoted slats or valves, and supported one above the other
within the reservoir, the levers W projecting from each valve, a horizontal lever, and
the bell crank lever pivotally connected to the levers W of each series of valves, and
levers for opening the valves in the upper and lower frames alternately, so that a
measured charge of sand is delivered from the upper to the lower part of the reservoir.
C. In a moulding machine, the combination of a reservoir for sand, a fixed frame
provided with a series of pivoted slats or valves, supported within the reservoir, a

page_text: vertically adjustable frame, also provided with a series of pivoted slats or valves
supported under the fixed frame, the levers W projecting from each valve, a horizontal
lever, and a bell crank lever pivotally connected to the levers W of each series of valves,
and levers for opening the valves in the fixed and adjustable frames alternately, so that
an adjustable measured charge of sand is delivered from the upper to the lower part of
the reservoir.
7. In a moulding machine, the combination of a reservoir for sand, a vertically
adjustable frame provided with valves, and having arms projecting through slots in
the reservoir, cover plates for the slots, secured to the arms, twin screws engaging
with the arms, and mechanism for revolving the screws simultaneously and adjusting
the position of the said frame within the reservoir.
8. In a moulding machine, the combination of a reservoir for sand, two frames each
provided with valves, supported one above the other within the reservoir, levers
pivotally connected to the valves for delivering a measured charge of sand from the
upper to the lower part of the reservoir, and from the lower part of the reservoir to
the moulding box, two revolving cams for operating the levers alternately in one
direction, and weights secured to the levers for restoring them to their original
position.
9. In a moulding machine, the combination of a reservoir for sand, a frame sup-
ported in the reservoir, the valves U, each provided with pivots U₁ and lever W, a
horizontal lever pivotally connected to each of the levers W, a bell-crank pivoted to
the frame and to the horizontal lever, and a link or lever pivoted to the bell crank
for opening and closing the valves.
10. In a moulding machine, the combination of a revoluble table provided with a
circular toothed rack, a spur wheel, a shaft for driving the rack, a worm wheel running
loose upon a shaft, connected to and actuating the said spur wheel, a revolving worm
for turning the worm wheel continuously, a clutch secured to the shaft next to the
worm wheel, a mechanism driven by the said worm for causing the clutch to engage
and disengage with the worm wheel, and revolve and stop the table, periodically, at
fixed.intervals.
11. In a moulding machine, the combination of a revoluble table, provided with a
circular toothed rack, a spur wheel mounted on a shaft for driving the rack, a worm
wheel running loose upon a second shaft, eccentric gear wheels for communicating a
variable velocity from one shaft to the other, a revolving worm for turning the
worm wheel continuously, a clutch secured to the second shaft next to the worm wheel,
and mechanism driven by the said worm for causing the clutch to engage and
disengage with the worm wheel periodically, at fixed intervals.
12. In a moulding machine, the combination of a revoluble table having a hole or
chamber in it, a moulding top box resting on the table around the hole, a pouring gate
pattern provided with a central stem, a ram guided within the hole in the table, and
provided with a central hole for the said stem, an anvil rigidly supported over the
moulding box, a revolving cam for raising the central stem, and a revolving cam or
cams for raising the ram and holding it in its raised position until the gate pattern has
been withdrawn from the moulding box.
13. In a moulding machine, the combination of a revoluble table having equidistant
holes or chambers in it, a ram, and a pattern, guided in each hole in the table, moulding
boxes, resting on the table around the holes, a sand reservoir provided with a delivery
valve over one of the moulding boxes, an anvil rigidly supported over the next
adjacent moulding box, a revolving shaft under the table, provided with cams for
simultaneously opening the delivery valve of the reservoir and raising the pattern, and
ram, under the anvil, and intermediate lever mechanism connecting the sand delivery
valve with the cams on the said shaft.
14. In a moulding machine, the combination of a revoluble table having equidistant
holes or chambers and a circular toothed rack, a ram, and a pattern, guided in each
hole in the table, moulding boxes resting on the table around the holes, a sand reservoir
provided with a delivery valve over one of the moulding boxes, an anvil rigidly

page_text: supported over the next adjacent moulding box, a revolving shaft, under the table,
provided with cams for opening the delivery valve of the reservoir, and raising the ram
and pattern simultaneously, intermediate lever mechanism connecting the sand delivery
valve with the cams on the said shafts, a shaft journaled in the frams of the machine
and provided with a spur wheel, gearing into the circular rack on the table, a con-
tinuously revolving wheel running loose upon each of the said shafts, and clutch
mechanism secured upon each of the said shafts and automatically engaging the said
revolving wheels with their shafts intermittently and alternately, as and for the purpose
set forth.
15. In a moulding machine, the combination of a revoluble table, having a hole or
chamber, a moulding box resting on the. table around the hole, an anvil rigidly
supported over the moulding box, a ram, and a pattern, guided in the hole on the table,
an automatic spring latch engaging with the table and holding it stationary, a revolving
shaft under the table provided with cams for raising the ram and pattern, and a tappet
secured to the said shaft for releasing the latch and allowing the table to revolve when
the cams have completed their actions.