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Патент USA US2102552

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Dec. 14, 19.37;
' ' ‘ Filed Oct. 29, ‘1935
5 Sheets-Sheet 1
(fa/m F Cam/obs”
Dec. 14, 1937.
Filed, Oct. 29, 1935
5 ‘Sheets-Sheet’. 2
Dec. 14, 1937.
Filed Oct. 29, 1935
5 Sheets-Sheet 4
Dec. 14, 1937.
Filed Oct. 29, 1955
5 Sheets-Sheet 5
Patented Dec. 14,‘ 1937
N 2,102,552
TV‘ oFricE
John FQCjampbell, Cuyahoga Falls, Ohio, assign
or to Wingfoot Corporation, Wilmington, Del.,
a corporation of Delaware
Application October 29, 1935, SerialL No. 47,243’
27 Claims.
The present invention relates to mold breakers
for opening multi-parted molds, particularly
those used inthe rubber industry for curing
automobile tires. These molds are generally
made in two sections, each section being in the
form of a disc or annulus, each section forming
‘one-half of the tire, as is well understood in the
art to which this invention pertains. In the rub
ber industry,‘ particularly,’ these molds are dif?
10 cult to separate in view of the fact that the
tread design is formed by a multiplicity of ridges
on the interior surface of the mold and some
of these project into the cured tire surface at
practically right angles to the direction in which
the mold sections must be separated. There
fore, in separating the mold sections, the tire
itself has to be distorted in order to pull out
this multiplicity of ridges from the grooves in
(Cl. 18-—2) 1'
and every one of the molds when they are prop
erly‘aligned with respect to the mold breaker.
Another object of this invention'is tovprovide
means for aligning ‘the molds laterally of the
conveyor‘ so that the edges thereof at one side
of the conveyor will be properly presented to the
mold breaker.‘ These molds are of different di
ameters and, since the mold breaker occupies a
?xed position along one side of the conveyor, it
‘is necessary to line‘ up the edge of the mold on
that side ofthe conveyor so that it will arrive
at the mold-breaking position in proper relation
to ‘the mold breaker, as otherwise the mold
breaker will not become operative to open the
mold. '
Another objectfof this invention is to provide
mechanism which will cause a complete cycle of
‘operation for the mold breaker, once the opera
the tire, and the result is that a tremendous I tion is started ‘ This is to ‘insure that there will
20 force is necessary to separate the mold sections.
Some steps have been taken to devise mechani
cal means to separate such mold sections, such
as by using a hydraulic mold breaker having
‘oppositely movable members which engage an
nular ?anges on the mold sections to force the
same outwardly away from each other. While
these mold breakers have lessened the amount
of manual labor necessary to separate the same
and separate them more efficiently than by hand
labor, nevertheless these devices still require con
siderable manual labor in moving them around
into the mold-opening position and they are not
designed for automatic operation or for large
scale production work.
Therefore, one object of this invention is to
provide a mold breaker which is automatic in
operation so that whenever the molds arrive at
a predetermined position in their travel ‘along a
given path the mold breaker will become op
erative and break the mold without requiring
the attention of an operator except, perhaps, in
'be no mi‘soperation of the mold breaker’, as might 20
voccur if the cycle of operation were interrupted
or if the various parts thereof were not complete
ly operated as intended. This will be described
‘more fully hereinafter in the detailed descrip
tion of the invention.
Another object of this invention is to provide
means whereby the mold breaker is moved along
with the mold as the mold is being broken so
that it is unnecessary to stop the conveyor or
mold at the position where the breaking be 30
gins. Preferably the speed of movement of the
‘mold breaker'is governed by the mold itself, so
that any variation in the 'speed of movement of
the conveyor will not affect the mold-breaking
operation. However, it is possible, but not pref- ‘
erable, to use mechanical means for moving the
mold breaker at the speed of the‘ conveyor with
out being'depe‘ndent upon the mold itself. One
reason why it is preferable to have the mold
govern the mold breaking is that, should the mold
itself come to rest or slip'relative to the conveyor,
cases of emergency.
the mold-‘breaking operation will take place just
Another object of this invention is to provide
a mold breaker which'will operate to separate
breaker will also be at rest and will not move
45 mold sections as they are presented at the mold
breaking position and independently of the spac
ing of the molds along their path of travel. _In
as e?iciently for, if the mold is at rest, the mold
in the directionof normal conveyor travel, this 45
always occupying a ?xed relative position with
respect to the mold. Or, if the mold slips on the
other Words, these molds generally rest freely
‘conveyor longitudinally thereof, the mold break
on a conveyor on which they are placed by the
operators who remove the same from the curing
pits, and as a result ‘the molds are not evenly
to the conveyor, and this would not be possible '
with a mechanical tie-up between the conveyor
spaced along the conveyor and it is necessary
that the mold breaker be so operated that re
gardless of the spacing of the molds on the con
veyor, ‘the mold breaker will operate on each
and the mold breaken'
Another object of this invention is to pro
vide means for automatically returning the mold
breaker to the initial position which it occupied 55
er will'also slip a corresponding amount relative
1 ' 2,102,552,
after the mold has been broken'and, in speak-f?
ing' of this initial position, I refer both to the
position which the same occupies longitudinally
with respect to the conveyor, as well as with re
spect to the mold-breaker mechanism proper.
Another object of this invention is to provide
Fig. 10 is'a' sideielevationrof a ‘detail of one of
the valve mountings,’
' -
Brie?y, my invention contemplates'the use of
a mold-breaking apparatus located at ‘one side
of a link conveyor or the like, having-a main 5
frame'with guides arranged parallel to the path
either ?uid pressure. or electrical means, or a
of movement’ of~the upper run of the conveyor.
combination of both for actuating the various
These guides. support a movable carriage which
in turn supports the hydraulic mold breaker.
This mold breaker is counter-balanced by suit
parts of the mold breaker.
Another object of this invention is to provide
mechanism which, while in the present. instance. . able means, such as a weight, and includes 'a
is illustrated as controlled by the mold itself, is
yieldable connection with the Weight so as to
capable of manual control without departing
from the spirit of the invention described’ and
[claimed in this application.
Another object of this inventionris to use hy.-'
draulic pressure for operating the moldrbreaker
proper to give the necessary pressure for sepa
Y permit the mold breaker to have independent ver
tical movement-relative to the counter-balancing
means, as will be more fully described herein
after. ,The mold breaker is guided vertically on
7' the carriage and hydraulic supply conduits are
arranged't'o supply pressure to the upper and
lower sides of a'piston arranged within'a hydrau
Another object of this invention 'is'to provide lic cylinder. To the cylinder ‘and piston, respec 20
means for regulating the. rate at which the mold tively, there is connected, respectively, mold-ring
breaker is returned to its initial‘ position and to J engaging: means for engagement between spaced
provide means for bringing the mold vbreaker to ' parallel rings on the respective mold ‘halves
restwithout jarring the. mechanism, even when .whereby when pressure is ,admitt'ed'to the side
rating the mold sections.
the mold breaker is returned to its initial posi-'
of the piston the mold-engagingv means move in
tion at a rather rapid rate.
opposite directions toforce the opposite halves
A still further object of this invention is to
provide means for adjusting the vertical posi
tions of the mold~engaging portions to take care
'of moldshaving parting lines and rim ?anges of
of the j mold outwardly away from each other.
The mold breaker is returned to its original posi
tion by introducing fluid under’ pressure to the
opposite side ofthe piston.
di?‘erent vertical heights above the conveyor, pro- .
vision being also made for counter-balancingjthe
weight of the mold breaker" while same is held
The supply of'fluid to the fluid-pressure cylin
der is controlled by an air valve, which in turn
has a suitable means which is engaged by the
mold as it arrives at the mold-breaking position
to actuate the air valveand thus supply-air to
in its verticallyadjusted position, so that it can
have a bodily ‘movement in a vertical direction
to accommodate itself to slight. irregularities in
the hydraulic valve which distributes, the pressure
to the desired side of the piston. to separate the
Other objects of this invention 'will- appear molds. After predetermined travel of the piston
hereinafter as the description of the invention ., relative to the cylinder, a' second air valve actu
40 proceeds, the novel features, arrangements and
ates (in'this case'by'means on the hydraulic, 40
the different molds. .7
' a’
_ V
combinations being clearly set forth in the speci- '7 cylinder) the hydraulic valve in such a way as
?cation and in the claims hereunto appended. ,
In the drawings:
7 .
Fig. 1 is a front elevation. of a mold. breaker
to supply hydraulic ‘pressure to the other side
of the piston, thus returning the parts to their
initial position, the hydraulic pressure holding
embodying my invention, some of ' the parts
the parts in this position until the next opera
thereof being broken away and in section for ' tion. 'An air cylinder normally'has air supplied
the sake of clearness;
to one side of a piston therein in such a way as
Fig. 2 is a sideelevation,’ of the same looking
from the left in Fig; 1‘, some of the parts being
broken away and in section for the sake of clear
to hold the carriage, in its initial position. 'As
soon as the hydraulic cylinder begins to operate,
the air in thisrair cylinder is released slowly so
as to form a cushion, and a weight connected
Fig. 3‘ shows a'detaill of my invention partly in
elevation and partly in section‘;
to the carriage pulls the ‘carriage along its, guides
at a speed determined-by the speedof the mold.
Fig.4 is a fragmentary view illustrating the’ The weight which moves the carriage along its
manner in which the mold breaker separates- the
mold sections;v
guides is just about suf?cient to overcome the
frictional forces resisting the movement of the
Fig. 5 is a cross-section through one of the carriage along its guides, the mold itself‘supply
air valves controlling the operation’ of the mold ‘ ing the addedforce necessary to move the mold
breaker and is‘typical of other similar valves uti
lized in this construction;
Fig. 6 is a plan view of the mechanism for insti
breaker carriage along’ its guides at the same
speed as the mold. When the mold halves have 60
been separated the necessary amount, the air’
bgating the operation ofv the mold breaker, the 7. valve for controlling the hydraulic supply which
same being shown in its relative position with
respect to the conveyor and mold‘;
Fig. r(illustrates diagrammatically the control
.mechanism for the moldbreaker;
returns the mold breaker to its initial position,
is'actuated'and the parts returnedto their initial
relative positions'as far as the hydraulic cylin 65
der and piston are concerned. ' These. parts'hav
Fig. 8 is a plan view of the means for lining ving been returned to their initial position, the
up the molds onthe. conveyorjlaterally thereof I air valve .for the air cylinder is then actuated
so that they will be in. proper position to be
70. acted upon by the mold breakerwhen- the molds
arrive at the mold-breaking position;
Fig. 9 is a diagrammatic’ view similar to Fig. '7
showing a modi?ed arrangement using electrical
‘means in part for operating the mold breaker;
to admit air under pressure to the cylinder to
return the carriage to its-initial position. 'A reg 70
ulating valve in‘the air line’ to the air cylinder
may be adjusted to regulate the speed at which
the carriage is returned to its initial position.
Should the mold, when it ?rst engages the
means which trips the ?rst air valve, and which 75
a very rugged construction adapted to stand up
the parts which might otherwise occur. For in
while at the same time lessening the frictional
stance, this ?rst air valve controls the hydraulic
valve and there might be merely a slight opera
tion of this air valve if the mold had not advanced
far enough along its path of travel. However, if
it is operated sufficiently to start the hydraulic
10 piston and cylinder moving relative to each other,
aimeans is provided for completely actuating the
?rst air valve so that it will move to its wide-open
position, thereby insuring that the hydraulic valve
will be open to its fullest extent to give maximum
I will now
proceed to describe this invention in detail.
As is seen from an inspection of Figs. 4, 6 and
8, there is provided a conveyor 2!}, preferably of
the link-belt type supported by suitable rollers 2i
20 on guide rails 22. The mold indicated generally
at 23 is composed of the upper and lower sections
2!; and 25 having annular rings or projecting
?anges 26 and 2'! thereon spaced from each other
15 compression for opening the mold.
and from the parting‘l28 of the mold.
nally of the frame 42, but that illustrated forms
in turn controls the hydraulic valve, stop or slip
‘relative to the conveyor, the parts continue to
function to open the mold to relieve the strain on
Referring particularly to Fig. 8, it will be noted
that at one side of the conveyor, which is the
side on which the mold breaker is arranged, there
provided a vertical guide 29 against which the
mold is forced by‘ means of a spring 30 arranged
30 at the opposite side of the conveyor, the spring
being mounted on the pin’ 3| and backed up. by
va pin 32 to assist the resilient action of ‘the
spring. On the ?rst-mentioned side of the con
veyor the vertical guide 2;‘) has a curved continua
do (ii tion 33 thereof curved away from the conveyor to
engage the mold to guide the‘ same laterally onto
the conveyor if the mold projects too far over that
side of the conveyor to be in proper alignment
for the mold-breaking operation.
Molds which
40 are projecting too far from the’ other side of the
conveyor are projected over against the guide 29
by the spring 30. With this arrangement the
molds are properly'aligned on the conveyor be
fore they reach the mold-breaking apparatus.
The mold breaker comprises a stationary frame
portion 34 and a movable carriage 35 mounted to
slide along suitable guides on the frame portion
34. The frame portion 34 and end members 36
and 37 are braced laterally by the front guide rails
38 and the rear guide rails 39, as well as other
longitudinally extending guide braces,'such as 4!}.
under the heavy duty required of this apparatus,
resistance to the carriage moving along its guides
38 and 39.
An air cylinder 49 is secured as by the bolts
56 between the end members M and 42 so as to
partake of the movement of the carriage. A
piston rod 55 has a threaded end 52 threaded into 10
the bracket‘ 53 on a web 54 of the end frame mem
ber 31 and is locked in place by a lock nut 55,
whereby the piston rod is held ?xed with respect
to the frame as. The frame end of the piston
rod carries the piston 56 which operates within 15
the air cylinder 49. Assuming that the carriage
35 is at the left of the frame 34 instead of at
the right as shown in Fig. 1, it will be apparent
that, if air is introduced into the air cylinder
through the conduit 51, the carriage will be moved 20
to the right into the position shown in Fig. 1.
In order to move the carriage in the opposite di
rection, I provide a weight 58 connected by a cable
59 running over a pulley ?ll to the air cylinder, the
end of cable 59 being connected to a hook 6| or 25
other suitable means on the air cylinder.’ The
weight 58 is suf?cient, or approximately so, to
overcome the forces which normally tend to re
tard the movement of the carriage 35 along the
guide rails 38 and 39. Therefore, it is a very 30
easy matter for the mold, when it becomes oper
atively connected to the carriage 35, to move the _
carriage along its guide rails without disturbing
the position of the mold on the conveyor, the
mold regulating the speed of travel of the carriage 35
to the left.
In Fig. '7, I have shown an air-control means
62 ?tted to the left end of the cylinder 49. This
air control means comprises a check valve 63 and
an ori?ce 534.
As the carriage moves to the left, .
air flows freely into the left end of the cylinder
£19 through the check valves 63 and ori?ce 64.
Should the carriage 35 be given its entire per
mitted travel to the left, it will strike a rubber
cushion 65 but, preferably, the cycle of opera 45
tions is so arranged that the mold breaker com
pletely opens the mold before the carriage com
pletes its travel to the left, with the result that
the means for returning the carriage operates to
return the carriage to its initial position at the 50
right before the carriage strikes the rubber cush
The carriage'comprises vertical end members Al
and 42 connected by upper and lower braces 43
and 44'» connected respectively to the upper and
lower ends of the members 4! and 42. Rollers
IE5 secured to the end members M and 42 straddle
ion 65.
the upper front guide rail 38 to prevent vertical
cided cushioning of the movement of the car
riage, due to the fact that the air to the left of .
the piston 56 can only escape through the ori?ce
til, since the check valve 63 closes when the 60
movement of the carriage and also provide a roll
ing guide therefor. Similar guide rollers 436 se—
cured to the end members 4| and 42 engage and
roll along the upper side of the guide rail 38.
As will be seen more clearly in Fig. 2, the car
riage is also provided with guide rollers 41 which
engage between the rear guide rails 39 to' prevent
vertical movement of the rear side of the carriage.
The rollers roll along the lower guide rail 39 but
will, on occasion, engage the upper guide‘ rail 39
to prevent upward movement of the rear side of
the carriage if a strain is placed on the carriage
The carriage is returned to its right-hand posi
tion by air introduced into the cylinder 49
through the conduit 5'5. As the carriage reaches 55
its extreme right~hand position there is a. de
piston moves to the left relative to the cylinder.
Therefore, the carriage is brought to rest at the
end of its stroke with a sort of cushioned move
ment'and the ?nal checking of the carriage
movement is accomplished by means of a rubber 65
bumper Bl.
The mold-breaking apparatus comprises a hy
draulic cylinder 68 having bearings 69 slidably
end members M and 42. Obviously, other means
mounted on guide rods ‘it which, in‘ turn, are
carried by brackets “H on the end members M
and 62 of the carriage 35. This permits the
cylinder to have vertical movement along‘ its
guides. As will be seen most clearly from an
inspection of Figs. 1 and 4, the underside of the
may be used for guiding the carriage longitudi
hydraulic cylinder 68 carries a foot ‘l2 having the 75
70 in such a direction as to 'move this rear side
of the carriage upwardly. Rearward movement
of the carriage is prevented ‘by means of the
guide rollers 48 arranged on vertical pivots on the
.toe extensions ‘I3 spaced fromeach other in a
I?trfrom whence it goes‘v into'the drain I07. "I'h’e
horizontal direction.’ Between'the toes ‘I3 there yvalvesIEM and IB5are constructed similarly to
is a toe "id arranged on the lower end of a piston
rod. 15 which extends upwardly through the hy
UK draulic cylinder 58 and carries a piston '56 there
that shown in Fig. 5 of the drawings, except that
no spring is used to control the movementof the
valve in one‘ direction.‘ Instead, the valves‘ I04
on, which reciprocates within the hydraulic cyl
and, . I65 are, controlled by links I08 and IE9
pivoted to an operating lever IIO, which'in turn
is pivoted at I I I to the valve casing 95. 1 As shown
The upper‘ end of the piston rod 15 has a '
reduced extension ‘H, which, as is most clearly
illustrated in Fig. '22, carries a yoke '58 at the up‘- 7 in Fig. 7, the pressure ‘is beingsupplied through
the conduit 98 and is exhausting from the con 10
10 per end thereof, and this, in turn, is connected
by means of a link ‘I9 to a rocker arm 85 pivoted duit 99. One end of the lever I III is pivotally
at 8I to a bracket 32 mounted on the upper brace connected to the piston rod'I I2 of an air cylin
der H3. This air cylinderhas inlets H4 and H5
43 of the carriage. To the'rear of the pivot {II
there is securedanother pivoted link 33 and this through which air is supplied to move the piston
H5 longitudinally of the cylinder H3. If air is
link has a series of holes 84, any one of which
may be'used for pivotally connecting the link 33 introduced into the cylinder II3 through conduit
I I4, the piston’ IQIE is m'ovedto the right, revers
to the rocker arm 85. The lower end of the link
33 is connected to the upper end'of a coil spring ing the positions of the valves I53 and I35, caus- _
85, which spring‘ in turn ‘is connected to an arm ing the pressure ?uid to .flow through conduit 99.
85 pivoted to a shaft'?l rotatably mounted on the into the upper part of the hydraulic cylinder 58.
carriage. This shaft 81 also has secured thereto This starts the mold-breaking operation pre
viously described.
an operating‘arm 33 used for the purpose of giv
In order to causeairqto flow under pressure
ing the proper tension to the spring 85.
The arm 88 is locked in any desired position by through the conduit‘ II4,'I :provide. a valve in
means of a pawl 39 operated by a hand-grip qdicated' generallyby the reference character
pivoted lever 93, the pawl engaging between ad;
In and shown more fully in Fig. 5, in which H8
jacent teeth SI on the rack 52 secured to they is a tubular member provided with screw threads
carriage 35.. The tension in the spring serves to 'IVIQ into which the end of the conduit H4 is
threaded. A slide-valve member I25 slides on'
counterbalance the weight of the hydraulic cyl
inderISB andasscciated parts.
t serves'to, regué
late also therdistance which the toes ‘I3 and ‘is
occupy in a vertical direction’ and, by regulate
ing theitension in the spring, the toes can be
arranged to enter between the?anges, such as
26 and 721, of any molds which come alongrthe
the" outside of the tubular member .I I 8 between
the full- ‘and dotted-line positions shown in
this ?gure. 7A lock nut IZI limits the movement
of therslide Valve'in one direction and is threaded
at I 22 .for connection to a supply conduit I23.
The valve I23 is; provided with suitable packing 35
and has, packing glands on either side of the
central recessed chamber I24. The tubular
However, since the weight of; the hydraulic, member H8 has a somewhat central position
cylinder etc. is considerable, and it would be
I25 on each side of which there are radial opendifficult for an operator to move the arm 88 with ings I2Band I21. Air 'under pressure is intro
all of this weight resisting the movement of the duced from the right in Fig. 5 or Fig. 7 and is
arm 88 when its motion is counter-clockwise, as stopped by the partition. I25. However, when
viewed in Fig. '2, I prefer to support a weight 93 the valve I20 is moved to the dotted-line posi
on the'end of the arm '86 to counterbalance the tion shown in-Fig. 5, the centralrecess chamber
weight of the hydraulic cylinder etc.’ and thus
I25 permits the air torpass through the tubular
permit the arm 88 to be moved with little effort member H8 around the'partition I25, for in this
conveyor, regardless of ' their vertical distance
above the conveyor within certain limits.
holes I2'I'are in communication with each other
operative position.
through the intermediacy of Vthe'chamber I24.‘
7 position of the valve both the holes I26’ and
tion. A spring 34 normally holdsrthe pawl 83 in
in either a clockwise or counter-clockwise direc
VMounted on the end member 35 of’ the sta » A coil spring I28 normally holds the valve I20 50
tionary frame 33 is a hydraulic control valve 95
in the right-handposition shown in Fig. 5 so
from which there extend two outlets E38 and 9'!
that the air is not supplied to the conduit I I4;
connected respectively by flexible hose connec
'As ‘will be seen from an inspection of Figs. 1
tions 98 and. 99 to inletconduits I88 and IGI, and?, there'is'a levergIZS pivoted at I30 to a
which enter the hydraulic cylinder $58 at the bracket I3I which supports the valve shown in
lower and upper ends thereof, respectively. 'With Fig. 5. A roller I32 on the upper end of the arm
7 this arrangement, ?uid under pressure can be
I29 is adapted to be engaged .by’a trip I33 on
supplied to either the upper or lower side of the
the end of an arm IBdpivoted on the reduced
piston ‘I5.
end portion of the right-hand guide ‘Ill.
When supplied to the upper end of
will vbe seen from an
60 the cylinder, the cylinder is raised to move the
toes ‘I3 and 14 out of alignment with each other ' the trip member I33
to break open the mold. When ?uid'is introduced ' rection, it forces‘ the
to the lower'side of the piston ‘It, the piston is‘ . this lever has pins
inspection of Fig. 6, when 60
moves in a clock-wise di
lever. I29 to the left and
engaging ' within the
groove i36'in the slide valve I20 whereby to slide
As ?uid is being supplied to one side of the piston,
the valve into its dotted-line position shown in 65
it exhaustsirom the other side of the piston. Y Fig. 5,‘ thereby causing the air to ?ow into the
returned to its normal position shown in Fig. 1.
The same connections carry the ?uid away from
the cylinder as carry the'?uid to the cylinder.
In Fig. 7, I have shown the valve 35 supplied
70 with fluid under, pressure from the hydraulic
.Vconduit H4, which, in turn, operates the piston
I I6, causing the rocking of the lever I I3 and the
movement of. the valves I04 and I55 to such
positions thatlthe hydraulic pressure is sup 70
pressure supply through conduit I02 to- the pres- ’ pliedto the upper end of the cylinder 58.
sure chamber I33 or" the valve 95. Sliding valves
I04 and IE5 control the supply of pressure fluid
to the conduits 58 and 9S and provide for the
75 exhausting of the ?uid into the exhaust chamber
trip I33 is pivoted to the arm I34 at I35 and is
held in the position shown in Fig. 6 by a’coil
spring, I3‘I.. This coil spring permits the trip
to pass the roller I32 on the counter-clockwise 75
movement thereof without operating the lever
reached the position where the trip I41 opened
I29. The mold is adapted to engage an abut
ment I38 on the arm‘ I34 and rock the arm in
a clockwise direction asv Viewed in Fig. 6. A
the valve I49 there would be no actuation of the
piston I I0, or at least there would not be a proper
spring I 39 returns the/arm to its initial posi
tion after the mold is out of engagement with
the abutment I38. The free end of the arm I34
piston would be approximately equal. The result
would be that either the device would stop with
actuation for the air pressure on both sides of the
thehydraulic cylinder in its upper position or some
of the parts might give away, although the latter
is not very likely. At any rate, by having the rod
I43 move the valve I20 to its fully open position, 10
the proper operation of the device in insured and
the hydraulic cylinder is returned to its initial
position. When the hydraulic cylinder moves
downwardly to its initial position the trip I41
moves away from the valve I49 and that valve 15.
closes under the influence of the spring em
bodied therein.
I Will now describe the means for operating the
air cylinder. As is shown diagrammatically in
Fig. 7, the foot 12 on the air cylinder carries a 20 ‘
bracket I53 shown extending from the side there
of in Fig. '7, but actually arranged to the rear
is supported and guided for horizontal move
ment by the lower end of the left-hand guide
10 10, which is provided with a nut I40 which sup
ports the arm but permits horizontal movement
thereof, a slot I4I being provided in the arm,
forming a guide, which permits the arm to have
this pivotal movement.
It sometimes happens. that the carriage 35
starts to move along with'the mold 23 before
the mold has had the opportunity to move the
arm I34 to the position in which the trip I33
has passed the roller I32 and, as a result, the
20 trip I33 may remain in engagement with the
roller and hold the valve in its dotted~line po
sition shown in Fig. 5, thereby keeping the air
under pressure in the conduit I I 4, whereas all
that is desired is to have enough air supplied
25 1 through conduit I I4 to move the piston H6 to
- its extreme right-hand position.
Therefore, in
order to insure that the arm I34 will be moved
to such a position that the trip will have passed
the roller I32, I provide means on the hydraulic
30 1cylinder for positively moving the arm to that
.position regardless of the extent‘ of movement
. of. the arm under the influence of the mold,
providing only that the’mold has moved the arm
I34 sufficiently to introduce some air under pres
35 :sure to conduit II4. This means is most clearly
shown in Figs. 3 and 6. Secured to the lower
end of the left-hand bearing 69 in Fig. 1 is a
laterally extending bracket I42 which carries a
depending rod I43 having a cam section I44,
40.»which cam section is arranged just below the
arm I34 when the parts are in the position shown
in Fig. 1. Supposing that the mold has engaged
the abutment I38 and has ,moved sufficiently
along its path of travel to actuate the arm I34
45 ;to', a point where the‘valve I20 is open and air
is supplied to the conduit II‘4. Since the air
in the conduit I I4 will move the hydraulic valve
to such a position that ?uid is supplied to‘ the
upper side of the hydraulic cylinder, it is obvious
r. ;-,that the hydraulic cylinder will start to move
upwardly, carrying with it the rod I43. As this
rod continues to move upwardly the cam portion
I44 therein engages the end I45 of the slot I46,
through‘ which the rod I43 extends.‘ ' The result
.55 iis that the cam portion I44 positively moves the
arm I34 to its extreme clockwise position, per
mitting the valve I20 to close.
Secured to the top of the air cylinder 58 is a
?xed trip I41 adapted to engage a roller I48
1”‘for operating the valve I43 constructed similarly
to that shown in Fig. 5, whereby when the cylin
der reaches such a position thatvthe ‘trip I31
operates the valve I49, air under pressure will
thereof, as will be seen in Fig. 10. The lower
end of the piston rod 15 also carries a bracket I54
which is shown extending to the one side, as in
Fig. 7, but actually it extends to the rear as in
Fig. 10. Between these brackets I53 and I54 is
supported a valve I55 similar to valves I20 and
I49. A spring I56 normally holds the valve I551
in closed position and set screws I51 engage the
valve I 55 to compress'the spring I56, and hold the
valve in open position when the hydraulic cylinder.
is in its initial operative position with the toes ‘
13 thereof aligned with the toe 14 on the end of
the piston 1.5. Therefore, after the hydraulic cyl 35'
inder has traveled upwardly and then downwardly
to its initial position, the valve I55 is opened and
air under pressure is supplied from the pressurev
tank I58, the pressure of which is regulated by a
pressure-regulating valve I59 in the air line from
the main air-supply conduit I60. This causes air
to be introduced through the conduit 51 into the
cylinder 49 to move the same and the carriage
connected thereto to the right, thusbringing the
carriage‘back to its initial position ready for
another operation.
As soon as the hydraulic
cylinder 68 starts its upward movement at the be
ginning of the cycle of operations, the valve I55
is closed and the air in the cylinder exhausts
through the conduit 51 and openings similar to
the openings I26 in Fig. 5. Thus, the mold being .
now gripped by the toes 13 and 14 can cause move
ment of the counterbalanced carriage in the direc
tion of movement of the mold, the air entering the
left-hand end of the cylinder49 through the check
valve 63.
I will now describe briefly the operation of
device. The molds 23 are carried along by the
conveyor 20 to a position adjacent the. mold.
breaker. Before they arrive at this position, how-‘
ever, they are linedup on the conveyor by the‘
vertical‘guide ‘29 and the spring30 so that the
edges of the molds which lie adjacent the mold
?ow from the conduit I50 through the valve to 1 breaker will be presented to the mold breaker,
051 .‘Foutlet conduit I5I and from there it is carried’ uniformly. As the mold reaches a position Op?‘
through a ?exible conduit‘ I52 and conduit II5 posite the mold breaker the flanges 26 and 21 on 1
to the air cylinder to move the piston back into the mold straddle the toes‘ 13 and 14, as'is clearly
the position shown in Fig. 7, thereby reversing illustrated in Fig. 2. About thistime the mold
the position-of the hydraulic valve and causing ‘ strikes the abutment I38 to rock the arm I34 ‘in ,
i‘?uid to flow under pressure to the lower side‘ of
the piston 15 to thereby return the hydraulic
cylinder to its initial position shown in Fig. 1.
Note that if the cam rod I43 ‘were not provided
and a condition existed where the valve I20 re
a clockwise direction as viewed in Fig. 6, thereby
causing the trip I33 to actuate the valve I30
through the intermediacy of ‘the roller I32 and
arm I29, causing a ?ow of air under pressure, to.
the air cylinder us. ,This air enters the left-Y.
751 ;mained open, then when the hydraulic cylinder‘ hand end of the cylinder as viewed in Fig.7,v
50 "
forcing the piston II 6 to~the right and this, ‘in
toes13 and 14 will properly engage the flanges
turn, operates the hydraulic valve 95 to cause 26 and 21. This regulation of the position of the
the ?ow of hydraulic ?uid through the conduit 96 . toes is; necessary for molds ‘having ?anges ar
into the hydraulic cylinder 68 at point abovethe j ranged at different heights. jIn the event the
. ‘piston 16. The‘ entrance of the fluidraises the
‘conveyors shouldstop'with amold in such a posi
‘ cylinder 68, in view of the fact ‘that ‘the piston tion as to have'opera'tedthe valve I20 partially,
1-6and piston rod 15.are held more or less in '
the cycle of movements necessary to completely
?xed position by the linkage 19, 66 and '63’ and
open the molds and return the parts to theirIorig
spring '85. This causes the toes .13 and'14 to move
'inal position will be carried out, regardless of
106 in opposite vertical directions against the ?anges the fact that the mold has stopped its movement
26 and 21, respectively, and I continued movement J in a horizontal direction, and for. the reason’ that
of the hydraulic cylinder separates the two mold
halves, leaving the tire 'held by one ‘of the mold
As the hydraulic cylinder reaches the upper ex—
tent of its travel, the-trip I41 operates the valve
I49 in such a manner as to cause air to?ow
through the conduit 1 I5 into the air cylinder I I3
- at the right-hand end thereof as viewedin Fig. .7.
the cam I44 will completelyroperate the arm I34
as previouslyfdescribed in connection witha con
dition where the carriage starts to move with the
mold before the valve I20 is fully. opened.
‘In Fig.9, I have illustrated a modi?ed means
for operatingjthe mold breaker. 4 In this ?gure,
similar reference characters refer to similar 'parts
in the jother ?gures. The electrical means shown
20 This, in't'urn, operates the hydraulic valve to cause‘ in this ?gure are to be situated in similar posi
a flow of, the’ hydraulic ?uid into the lower end tions with respect to the carriage and frame of
of the cylinder 68, thereby causing the hydraulic 'the machine, the'same as in ther?rst form of my
cylinder to descend into its original position. The invention described.
valve 95, as previously'explained, is so constructed
In place of the hydraulic valve '95 illustrated in
25 that when ?uid is?owing into the hydraulic cyl .the ?rst embodiment, I‘employ'the three-way
inder at one end thereof ,it is?exhausting from the rrhydraulic valve I66 operated by a lever I6I to
other end of the cylinder1
control the flow of hydraulic ?uid from the source
As the toes 13 and 14 grip the flanges, the toes‘ of supply I62 to'either the. conduits I63 of I64,
are separated suf?cientlyto cause the valve I55 to the ?uid-exhausting through the drain I65 from
be-closed in the manner previously described, ' one of the conduits I63'or I64; when fluid under 30.
thereby cutting offthe ?ow of: air from’ the air‘ pressure isrbeing supplied from ‘the sourcefof
_ supply to the air cylinder '49, the air cylinder‘ supply I62 to the other of the conduits. The con
in this. cylinder previously holding the carriage in duit I63 supplies ?uid to the upper'rend of the cyl
the'position illustrated in‘Fig. 1. .Not only is the inder 68 and conduit I64 supplies‘?uid to the lower
35 air supply to the cylinder 49 cutfoff but the air ‘J end of the hydraulic'cylinder 68, depending upon
i is permitted to
35, ‘
exhaust from a the V right-hand ‘
: the position of the valve I60. To the lever I6 I are
end of the cylinder 49 through conduit '51, so as'to , secured core members I66 and i6? forming cores
permit the carriage 35 to. move freely with‘ the
mold in the direction of the travel thereof. The
weightr58 which counterbalances, the frictional
for the solenoids I68 and I69, respectively. The
solenoids I68 and I69 are connected, respectively,
to the. relays I10. and HI. The solenoids are
and other forces tends to retard the carriage 35 .' adapted -toibe energized only for a period suf?cient
and it is therefore very easy for the mold to drag '
to raise their respective cores and at different
the carriage .alongvwith it through the gripping ' times, the time of operation of the solenoids being
I engagement ofthe toes 13'and .14 with the ?anges
controlled by means of suitable. switches.’ The
' ~
' solenoids I16 and HI are connected to thepower
45.26 and 210m the mold. .
After the mold has lbeenrseparated, the carriage
line I12 and are. controlled by the switches I13’
35 has moved to theleft until it occupies a posi-v and 314.’ The latter switch is a normally closed '
tion near. the left-hand'end of the frame 34.4 As switch having an arm extensionfl15 adapted to
the hydraulic cylinder 68 descends intoits initial 1 be'engaged by-t-heend of the core VI61 when the
position relative tethepistonQ-the valve I55 is same israised by energizing 'thelsolenoid I69 to 50
again opened andjair under pressure is supplied ' open the switch and break the electrical circuit ‘to
to the cylinder 49 to the right of the piston 56 and . the relay i1I at this point. The switch I13 is
since this cylinder is connected directlyto the’ normally opened and‘ is adapted to be engaged
carriage’ 35 vthe. ‘carriage :is returned tort-hat byv the mold thesaine as is the abutment" I38 in
position shown in-Fig. l. ' The speed at which the: Fig. 6. The mold closes this switch and, ‘since the
carriage is returned to its initial position is regu- ' 7 switch I14 ‘is already ‘closed, the circuit is com
. lated by the valve I51 which may be any desired pleted'through‘ the leads I16 to the relay I1I,
type ofreducing valve. '
V a
j 7
causing the solenoid‘ I69 to operate. This draws
Should the mold fail to move the arm I34‘ as" the corefl61 upwardy. and the core, i'n'striking much as ‘is required to move the tripll33 com- '
pletely past the. roller. .532, the cam portion I 44
on'the rod I43 will insure thatfthisis accom;
I plished, for it travels upwardly'with the hydraulic
thearm I15, opens the, switch I14 and'the circuit 60
to the relay so that the solenoid will not be'burned
up‘ or subjected to undue heat, as would occur if
the ‘solenoid were permitted to operate until the
' cylinder Y68, and" the cam portion Ill-l4 will engage ‘ mold passed out' of. engagement with the switch
65 the end “I 45 of .the slot I 46. tomove thearm I 34 r‘ (I13: This‘ becomes extremely important in the 65.
1 su?lcientlyin' an upward direction, as viewed in ' case where a_ mold should happen to belstoppe'd
Fig. ‘6,.to ca'usetheftrip I33 to completely. pass ' rat the position where’ itrhas just closed the switch
the roller I32.»_
a»? 7'
vertical 'positionx‘of Vthe toes~135and 1.4 is
'- Tl'ie'hydrauli'c cylinder 68, 'being?supplied with ’
70 regulated by the arm 88, which, through'the in; ‘ hydraulic ?uidlthrough the conduit I 63 at the
‘termediacy of “the spring 85, determines the >ver-' . upper’ side'offthe piston 16, moves upwardly to . '
trical position of the air-cylinder and piston rod break themold and continues its upward move
ment until 'theitripMll strikes the 'switch‘arm I11
associated therewith. , In addition, the spring .85 '
permits sufficient relative vertical movement vbe- ' to close the switch I18 and thus close the cir
75 tween the piston rod and piston to insure that the l V cuit to the‘relay I16 through the leads ‘I19. The
operation of the relay, l'ill causes ‘the solenoid I68‘
to be energized to draw the core its into the
position shown in Fig. 9, the dropping of the core
it? during this operation permitting the switch
. 6. In a’mold-breaking apparatus, the combina
tion with a frame of a mold-breaking means
lid to be closed ready for the next operation. The
mounted on said frame for sliding movement
air cylinder 49 is operated by the connection
during the mold-breaking operation, a conveyor
mounted for movement past said frame in a di
rection substantially parallel to the movement
of said mold-breaking means, hydraulic means
for actuating said mold-breaking means,- pneu 10‘
shown in the same manner as described in con»
nection with the ?rst-described embodiment of
my invention, but if desired electrical means
10 could be provided for moving the carriage 35 back
to its original position and for holding it there
if desired instead of using the air cylinder herein
15 invention pertains may make various changesin
the construction and arrangement of the parts
described in connection with the embodiments of
my invention disclosed without departing from
the spirit of the invention and, therefore, I donot
20 Wish to be limited except as may hereinafter be
set forth in the claims hereunto appended.
Having thus fully described my invention, what
I claim and desire to secure by Letters Patent of
the United States is:
matic means for controlling said hydraulic means
and trigger mechanism for operating said pneu
matic means arranged adjacent said conveyor
Obviously, those skilled in the art to which this
ating the means for supplying the power topper-i
ate said mold-breaking apparatus.
1. In a mold breaker, the combination with a
frame, of a carriage slidable along said frame, a
mold conveyor moving in the general direction of
movement of said carriage along said frame, reia-~
tively movable elements on said carriage for en
'30. gaging the mold sections of a split mold for sepa
rating same, and means actuated by said mold as
7 said mold arrives adjacent said elements for oper
' vating said elements and to move said carriage
in the path of movement of a mold adapted to be
carried by said conveyor whereby it will be actu 15
ated by said mold as the latter moves into opera
tive engagement therewith and whereby the
operation of said .mol-d-breaking apparatus is
controlled by the mold according to the time of
arrival of said mold at the moldébreaking vposi
'7. Mold-breaking apparatus comprising rela
tively movable parts for engaging and separating
mold sections, a conveyor for conveying molds
past said mold-breaking apparatus, said mold
breaking apparatus being mounted for bodily
movement in the direction of conveyor movement
during the mold-breaking operation, and a single
operating means which, when operated, sets in‘
motion automatic means for successively'moving
said elements relative to each other from their
tuated thereby, for operating said mold-breaking
initial position into such a position that in oper
ating on a mold the mold sections are separated,
next returns said elements to their original posi
tion relative to'each other and thereafter holds
said parts in their inoperative position until the
next actuation of said operating means, said’
mold-breaking apparatus being free to move in
unison with said mold as it is carried by said
conveyor whereby the movement of the mold with
the conveyor is not interrupted during the mold
apparatus when a mold arrives in aposition to be .
breaking operation.
operated upon by said mold-opening apparatus,
3. In a mold breaker, the combination with
a slidably mounted carriage, a conveyor moving
8. Mold-breaking apparatus comprising a con
veyor for conveying molds, a carriage mounted
for sliding movement adjacent said conveyor in
a direction substantially parallel to the move
ment of said conveyor, mold-breaking means
mounted on said carriage, means. for retaining
the carriage in an initial position to present'the
501 in the general direction of movement of which
mold-breaking means to the mold as the latter
the direction of mold movement.
2. In a-mold breaker, the combination with a
frame, of a carriage slidable along said frame, a
mold-opening apparatus on said carriage, a con
veyor for conveying molds to and past said car"
riage, means arranged in the path of movement of
40 the molds being carried by said conveyor and ac
and means for moving said carriage in unison.
45 with said conveyor in the general direction of
conveyor movement during the mold-breaking
said carriage is capable, a mold-breaking appa
arrives opposite said mold-breaking means at
ratus on said carriage, and means for operating
said mold-breaking apparatus when said mold
saidinitial position,‘ means for operating said
mold-breaking means when said mold—breaking
arrives at a position adjacent said mold-break
means and mold are in proper operating rela
‘ing apparatus, said mold-breaking apparatusv tion with resp-ectto each other, and means for
being movable in unison with said mold in the
direction of movement of said conveyor during
the mold-breaking operation.
releasing said carriage during the operating or
said mold-breaking means to permit’ said car
riage to move with said mold in the direction of
mold travel during the mold-breaking operation.
9. In a mold-breaking apparatus, the combi
carriage mounted for sliding movement substan
tially parallel to said conveyor, mold-breaking nation with a mold-breaking means, hydraulic
apparatus on said carriage, means for operating means for actuating said mold-breaking means
in opposite directions, pneumatic means for con
said mold-breaking apparatus, and means oper 7 trolling said hydraulic means, includinga pneu
matic cylinder and piston for, operating said
with said mold-breakingapparatus, for instigat~ ?uid-pressure means in opposite directions, a
ing the operation of said mold-breaking appa
pair of conduits connected to said cylinder for
ratus,- said carriage being movable with said introducing air into said cylinder on opposite
mold as said mold moves along with said con-r sides of said piston, separate valves for supplying
703 veyor and during the operative‘ engagement be~ the air to said cylinder in each of said conduits,
tween said mold and mold-breaking apparatus. a trigger mechanism operated by the mold as it
5. A device as set forth in claim 4 in which the approaches the mold-breaking position adjacent
means for instigating the actuation of said mold
the mold-breaking means, said trigger mecha
breaking apparatus ‘comprises ?uid-pressure nism being operatively connected to one of said
75 means rendered operative by said mold for actu
valves to operate the same on actuation thereof
4. A mold breaker comprising a'conveyor, a
2,102,552“ I
and to immediately release said valveuponfull‘ the position ofwllthe cylinder and associated ele
operation of said trigger mechanism, and means
connected to said mold-breaking‘means for in
ments in their normal balanced position may be - ' '
.14. In a mold-breaking'apparatus, the com-7
bination with a conveyor for‘ conveying moldsto
suring the full operation of said trigger mecha
nism once said mold-breaking means is set'in“
operation whereby to release the ?ow-of air .to
a mold-breaking position, of a mold breaker ad
said pneumatic cylinder on one side of said piston
prior to the time when the mold-breaking means
jacent said conveyor at said position, comprising
a frame, a mold breaker mounted on said frame
reverses its motion whereby upon operation of.’ for movement in thedirection of movement of said
10 said other valve the piston will ‘be free to move " conveyor, ?uid~pressure means for normally hold 10'
under the in?uence of the air introduced'through V . ing said mold breaker in an initial position to op
the conduit in’ which said last-mentioned valve erate onja moldrpresented thereto by said con
is arranged, and means for operating said last'-. 7' veyor, fluid-pressure 'means. for operating said
mentioned valve after the‘moldebreaking means . mold breaker, including vvalve means, trigger '
' means adapted to be engaged by a mold as the lat
has broken the mold.’
ter arrives at said mold-breaking position, a 0011-‘
10.;Mold-breaking apparatus ' comprising a
mold breaker, a conveyor'for moving molds into nection between said trigger and said valve means .
.operative position with respect to said mold ’ for operating the-latter to thereby operate said
mold breaker, ‘when said trigger ‘is-1 actuated,
breaker, and means for arranging said molds in
means operable upon actuation of , said mold 20
'20 a predetermined position transversely of said con
breaker for releasing said ?uid-pressure hold
veyor by the time the same arrive at the mold
breaking position,>comprising a ?xed abutment ' ing'means- whereby, said mold-breaking breaker
arranged along one side‘of ‘saidconveyor andv may‘ move with said -mold' in the direction of
, r
yieldably pressed means on'the opposite side of movement of said conveyonif
15. In a moldebreaking apparatus, the combi
said conveyor 'for engaging and pressing the
Vmolds against said ?xed abutment as'the molds 1 nation’with:a,conveyor¢for conveying molds. to a
move along with the conveyor whereby the edge _V mold-breaking position, of afmold breaker'ade
of the mold adjacent said ?xed abutment jis posi ' jacent said‘conveyor at said position, comprising
tioned in'a predetermined relation with respect a frame, a mold breaker mounted on said frame
30 to the adjacent edge of said conveyor. '
for movement in the direction of movement of
said conveyon?uid-pressure means for’normally
11. In a mold-breaking apparatus, the ‘combi
‘holding said mold breaker in an initial position to
nation with a mold support, a mold-breaking ap
operate on a mold presented thereto by said conparatus adjacent'said support comprising mold
veyor, ?uid-pressure means for operating said" '
breaking elements, means for operating said
mold breaker, including ‘valve means, trigger
means adapted to be'engaged by a mold as the lat
03 Cl mold-breaking elements, said mold-breaking ele
ments being mounted ‘for substantially vertical’
ter ‘arrives at said'mold-breaking position, a con
ing bodily movable in a ?xed verticalpath, and ' nection between said trigger and said valve means
means for- counter-balancingr'said elements and for operating the latter to thereby operate said 7
40 operating means to position the'same' in a bale "mold breaker when said trigger is actuated, means '
anced position at different pointsin said path . operablerrup'on actuation, of: saidv mold breaker.
comprising a counter-balancing 'element which ior; releasing said ‘?uid-pressure holding hmeans
' movement with respect to each othenand also 'be- .
counter-balances said ' mold-breaking elements 1 whereby said mold~breaking breaker may move
and operating means, and means for changingthe * ‘ with said mold in the direction of movement of 7
position of said counter-balancing means where
by the counter-balanced position of said mold
said conveyor, and means for’ actuating’ said
{mold breaker. in the direction of movement oi
breaking ‘elements is at .a different point in its " said conveyor to assist the movement of said con»
path of bodily movement.
7'12. A'device as setrforthin claim 6'in which the
veyor with the mold upon which it is operating.
. 16. In a mold-breaking apparatus, the combi
nation with a conveyor for, conveying molds to a .50:
a pivoted lever having means for 'lockinghsame in mold-breaking position, ‘of a mold, breaker adja->
dill‘erent operative positions is utilized to move the ; ' cent said conveyor at said position, comprising a
'positionof said spring counter-balancing means ,frame, a mold breaker mounted on saidiramefor
to different operative positions, theZspring being movement in the direction of movementrof said
- also connected to the mold-breaking elements and‘ conveyon'?uid-pressure means for normally hold-j’
' counter-‘balancing means isa spring and in which >
operating 'means 7 to ‘correspondingly move ‘same . ing said mold breaker in an initial position to op
bodily along their pathof bodily movement a pro- , " erate on a mold presented thereto by said con
portionate amount.
13. Mold-breaking apparatus
veyor, ?uid-pressure means for operating said
comprising , a;
60 frame, a hydraulic cylinder mounted for vertical
movement on said 'frame', mold-breaking -ele—
ments operated by said hydraulic cylinder, a lever .
mold breaken'including electrical means for op- '
.erati-ng said ?uid—pressure means, trigger means
adapted to be engaged by a mold as said latter ar
rives at the mold-breaking positiorna connection
, pivoted to said frame, said lever having a pivotal ,7 ‘between said trigger and said electrical ,means'for
' ' connection'with said cylinderlat a point removed . operatinggtheillatter to therebyoperate'said mold
breaker when said‘v trigger isjactuated, means op 05 "
a counterbalancing spring having one end ‘cone’ erable'upon lactuation'of said mold breaker-forv
. nected to said lever at a point removed from the releasing said , fluid-pressure fholdingerneans 'point'of pivotal. supporthofrsaidplever onsaid" whereby said mold-breaking'breaker may ‘move >
frame, and an adjustable member to which the “ with said ‘moldrin the direction offmovem'ent of
opposite end of said spring is'connected, said‘
.from its point of pivotal support on said frame,
spring counter-balancing the weight‘ of 'saidgcyl~
.,17..In"a mold-breaking apparatusJthe com
inder and associated elementsto hold:the same bination-with a rconveyorl for'iconve'ying molds to
yieldingly in a given vertical position, and said ‘ a moldézbreaking position, of a'm'old breaker ad
fadjustable member being adjustable to'position ' jacent said‘ic’onveyor atnsaid position, compris-v
' the spring at different operative positions whereby , inga frame, a mold breaker mounted on'said
' frame for movement in the direction of move
ment of said conveyor, fluid-pressure means for
normally holding said mold breaker in an initial
position to operate on a mold presented thereto
by said conveyor, ?uid-pressure means for op
erating said mold breaker, including electrical
means for operating said ?uid-pressure means,
trigger means adapted to be engaged by a mold
as said latter arrives at the mold-breaking posi
tion, a connection between said. trigger and said‘
electrical means for operating the latter to there
by operate said mold breaker when said trigger
is actuated, means operable upon actuation of
said mold breaker for releasing said fluid-pres~
sure holding-means whereby said mold-breaking
breaker may move with said mold in the direction
of movement of said conveyor, and means for.
ment, mold-breaking apparatus on said carriage
mounted for bodily movement with said carriage a
in the direction of sliding movement ‘and also
movement relative thereto transversely to the
movement of said carriage relative to said frame,
and means for operating said mold-breaking ap
paratus at the time a mold ispresented thereto, 10
comprising means operated by said mold for in
stigating the operation of said mold-breaking ap
23. Mold-breaking apparatus comprising a
frame, a carriage slidable on said frame, ?uid
pressure means for actuating‘said carriage rela
actuating said mold breaker in the direction of
tive to said frame in one direction, a conveyor for
supporting molds and for moving them to a po
movement of said conveyor to assist the move"
sition adjacent said carriage, mold-breaking ap
20 ment of said conveyor with the mold upon which
it is operating.
18. Mold-breaking
mold conveyor, a frame mounted adjacent said
conveyor, a mold breaker mounted on said frame
N) El for movement in a direction substantially par
allel to the direction of movement of said con
veyor, a ?uid-pressure cylinder connected to said
mold breaker for normally holding said mold
paratus on said carriage for movement therewith
engaging said mold and adapted to be moved
along said frame in unison with said mold dur
ing the operation of said mold-breaking appara
tus, and means for actuating said carriage in a
direction opposite to that in which said carriage
is moved by said ?uid~pressure during the time
the mold-breaking apparatus is operating to open
a mold.
breaker in a position in its path/of‘movement
adjacent that end of its path of travel which lies
closest to the molds are first presented to said
mold breaker by said conveyor, means for oper
ating said mold breaker to break the mold as it
is presented to said mold breaker at said posi
tion, and means automatically operable after the
24. A device as set forth in claim 23 in which
said fluid-pressure means holds said carriage at 3O
the end of its travel until said mold-breaking ap
paratus begins to operate on said mold, where
after said fluid-pressure means is released to
permit said carriage to move with said mold
under the in?uence of said second actuating
instigation of the mold-breaking operation for
releasing said ?uid-pressure means whereby said
mold breaker may move along its path of move
ment in unison with the mold being operated
40 upon.
19. Mold-breaking
apparatus comprising
25. A device as set forth in claim 23 in which
said mold upon moving into operative position
relative to said mold-breaking apparatus renders
said second actuating means operative.
26. In a mold-breaking apparatus, the com
mold conveyor, a frame, a carriage slidable on
bination with a frame, a conveyor adjacent said -
said frame in a direction substantially parallel to
the conveyor movement, a hydraulic cylinder
frame’ for moving molds past said frame, a car
riage slidable along said frame in the direction
of conveyor movement, mold-breaking appara 45
tus on said carriage mounted for movement
therewith, electrical control means for instigat
ing the operation of said mold-breaking appara
tus to break the mold, electrical means for re
45 movable with said carriage and also slidably
mounted on said carriage for movement trans
' versely to the movement of said carriage, a piston
operating Within said hydraulic cylinder and
movable relative thereto and to said carriage,
50 mold-breaking elements carried by said piston
and cylinder, and means for introducing ?uid
under pressure into said cylinder to move said
elements relative to each other when said mold
arrives in position adjacent said elements.
22. Mold-breaking apparatus comprising
mold conveyor, a frame, a carriage slidable on
said frame in the direction of conveyor move—
20. A device as set forth in claim 19 in which
said mold operates the means for introducing
?uid under pressure into said cylinder, when
said mold arrives in an operative position rela
tive to said mold-breaker elements, such that said
60 elements may act on said mold to break the same.
21. Mold breaking apparatus comprising a
mold conveyor, a frame, a carriage slidable on
said frame ‘in the direction of conveyor move
ment, mold-breaking apparatus on said carriage
65 mounted for bodily movement with said carriage
in the direction of sliding movement and also
movement relative thereto transversely to the
movement of said carriage relative to said frame,
and means for operating said mold-breaking ap
70 paratus at the time a mold is presented thereto.
turning said mold-breaking apparatus to initial 50
position and means for moving said carriage rel
ative to said frame in the direction of conveyor
movement and in unison with the mold to be
27. In a mold-breaking apparatus, the com
bination with a frame, a conveyor adjacent said
frame for moving molds past said frame, a car
riage slidable along said frame, mold-breaking
apparatus on said carriage mounted for move
ment therewith, ?uid-pressure control means for
instigating the operation of said mold-breaking
apparatus to break the mold, ?uid-pressure
means for returning said mold-breaking appara
tus to initial position and means for moving said 65
carriage relative to said frame in the direction
of conveyor movement and in unison with the
mold to be broken.
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