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Патент USA US3076245

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Feb. -5, 1963
H. L.. REKART
3,076,238
MOLD EJECTING MACHINE
Filed May 9, 1960
4 Sheets-Sheet 1
Tm.
INVENTOR.
Feb. 5, 1963
Filed May 9, 1960
>
H. l.. REKART
3,076,238
MOLD EJECTING MACHINE
`
4 Sheets-Sheet 2
INVENTOR.
Feb. 5, 1963
H. l.. REKART
. 3,076,238
MOLD EJECTING MACHINEv
Filed May 9, 1960
4 Sheets-Sheet 3
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63
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96
INVENTOR
BY
A44/MM. MMU
¿2/
Feb. 5, 1963
'
y
H; L.. REKART
'
3,076,233
MOLD EJECTING MACHINE
Filed May 9, 1960
Fi y. 13
4 sheets-‘sheet 4
Fi g. 14
F1745
INVENTOR.
UnitedStates Patent() *cek
3,076,238
Patented Feb. 5, 1963
1,
2
Work that'is entailed in transferring flasks onto and of‘t"
.
3,076,238
.
5 of a conventional shake-out machine.
MOLD EJECTING MACHINE
In brief, the present invention is generally embodied in
an apparatus for removing a poured mold, including theï`
casting contained therein, yfrom an open end molding flask.
This apparatus comprises means for supporting the flask
Harold L. Rekart, Elmhurst, lll., assignor to National
Castings Company, a corporation of Ohio
Filed May 9, 1960, Ser. No. 27,709
20 Claims. (Cl. 22-95.5)
- with both ends thereof exposed; closure means for engag
This invention relates to foundry equipment> and par»
ticularly to a machine in which a poured mold, including
ing the entire periphery of one end portion of the flask
to provide a sealed connection therewith and a cavity
the casting enclosed therein may be removed from a con
overlying the adjacent end of a mold held by the flask;
ventional flask of the‘ so-called “permanent”4 or “tight”
a reservoir for storing a -fluid, such as compressed air,
at elevated pressure; duct means connecting the reservoir
with said cavity and having capacity providing such rapid ‘
transfer of a fluid stored under pressure in the reservoir
to the cavity as to effect instantaneous equalization of
type consisting normallyV of separable ycope and ‘drag
halves.`
v
.
,`
‘
„
In conventional foundry practice, a tight flask retains
the mold in the flask until the casting is poured and the
mold and the casting are separated from the flask. Tight
flasks of ordinary size are usually made of steel with the
tops of the cope portions and the bottoms of the drag
portions being open. In the larger flasks, the drag por«
tion is commonly heavily reinforced by a grid work with 20
pressure between the reservoir and the cavity. A neces-'_
sary component of the -duct means is valve means in
stantaneously operable from a closed condition to an
open condition to effect said transfer of the fluid. ~
In a preferred embodiment, the reservoir, the closure-
iu its lower end portion. Frequently, the walls of the '
Y cope and the drag are further reinforced by perimetric
means, and the duct means form a single unit which is
movable relatively to the portion of the apparatus which
supports the flask. This vembodiment may include also
a mounting for moving the unit into and out of a position
forengaging a flask held by the apparatus in proper posi#~
tion for ejecting a poured mold therefrom. The appa
ratus may further provide a cradle or other support for
the flask whereby it may be received from a conveyor
oorrugations. The corrugations and the grid work tend
to trap the poured mold within the flask and make forc
ible removal of the mold and the casting carried therein
necessary.
.
»
Except for very heavy castings requiring casting by pit
methods, “tight” flasks `ofsteel construction are preferredv
in the production of medium to heavy castings in quantity.
system and inverted to a position for being engaged by the
However, as the size of the castings increases, the amount 30
of heat needed to be dissipated in the poured mold in
unit.
`
`
-
In another form of the invention, the apparatus may be
creases and results in the mold being baked to a greater
provided with a flask support incorporating conveying
structure cooperatively arranged with a flask-supplying
and flask~receiving conveyor system to eliminate manual
handling of the flasks throughout the mold ejection proc-
hardness. This baking effect is even greater inthe making
of‘steel castings since steel must bepoured at a higher
temperature than iron.
A mold and a solidified casting carried therein is're
ess practiced therein.
moved from the tight flask by shaking theflask on a
'
In the drawings with respect to which the invention is
vibrating platformof a “shake-out” machine. The cost of
-described in detail: `
Y
such a machine is substantial since it must be capable of 40
FIG. 1 is a perspective view of a flask containing a
handling loads involving several hundred pounds to sev
poured mold; ^
er'al tons. Because of the impact necessary to eñiciently
FIG. 2 is a perspective view of a flask similar to the
remove the contents of the flask, the machine and also the
one shown in FIG. 1 in inverted position showing the
flasks sustain severe wear and attrition in spite of their
grid reinforcement in the bottom of the drag half of the
heavy construction. Moreover, each “shake-out” opera
tion involves a significant expenditure of time since plat
flask;
Y
Y
-
-
. FIG. 3 is a front elevation with minor foreground por~>
form oscillation lasts several minutes and the operation
tions broken away, of apparatus in accordance with aV
also includes some manual cleaning and handling steps `
preferred embodiment;
v
t
wherein the flask is conditioned for receiving a fresh mold
FIG. 4' is an elevation in section taken along line
and then placed in a position for being conveyed lto the 50 IV-IV of FIG. 3;
~
next operation.
ì
FIG. `5 is a plan view of an adapter plate partially con-m
stituting the flask closure of the apparatus shown inz
Hence, the primary object of this invention is to pro
vide a less~expensive, quicker method of unloading flasks
FIGS. 3 and_4;
of the type heretofore requiring unloading «on a “shake- ‘
out” machine.
plate of FIG. 5;
jects as: (1) to reduce the time required for removal of a
poured mold from a flask; (2) `to -speed up the recovery
to provide a new type of equipment to speed up the pas
-
tuting the flask closure and cooperating >with the adapter,
55
The foregoing object includes ‘such more specific ob
o-f castings from fragmented mold material; (3) to reduce
the floor space needed for flask unloading equipment; (4)
,
, FIG. 6 is a plan view of a header plate partially consti
FIG. 7v is an elevation in section ofthe flask closure‘»
taken along line VII-_VII of FIG.v 4; «
»P_IG. 8 is a perspective view of a'ñuid-applying unit of,l
60 (the apparatus in FIGS. 3 and 4;
I
-. L "
FIG. 8a is a schematic plan view of a valve control sy's-‘
sage of flasks through the _mold-removing stations and
tem used inthe apparatus of FIG. 8;
f, r‘
thereby to either reduce the number of flasks. required
FIG. 9 is a fragmentary elevation of a' clamping mech--`
and/or the number of flask unloading machines, and in
lanism for securing flasks within the apparatus of FIGS.`.
either case to reduce the plant'space requirements fora 65 3 and 4;
synchronized mass~casting foundry process; (5) to in
FIG. 9a is a schematic perspective View of a manual*l
crease the service life of flasks and reduce the main
worm drive for the clamping system shown in FIG. 9; and:
tenance costs thereof; (6) to reduce the labor costs en
FIGS. 10 to.15 are diagrammatic elevations of the ap
tailed in removing molds from flasks; (7) to improve
paratus of this invention depicting it in various -stages of
working conditions by reduction of noiseand dust which 70 operation in the process of >receiving a flask, removing a
accompanies the conventional shake-out operation; and
poured mold therefrom, and returning the empty flasvkitoî
(8) lto eliminate the lifting of flasksrand other manual " a conveyor system. y
"
«3,076,238
3
4
wherein the bottom of the drag 6 faces upwardly toward
the unit 1'9. To achieve further versatility of the ma
chine with respect to flasks of varying sizes, the cradle
FIGS. 1 and 2 illustrate a flask 5 comprising a drag 6 and
a cope 7 containing, as shown in FIG. l, a poured mold
having an upwardly-protruding pouring cup 9 and open ris
ers 10 and 11. The cope and the drag are ordinarily held
together by some arrangement such as that shown wherein
18 may be constructed in relatively adjustable side sec
tions A and B of which side portion A is adjustable length
wise of the axis of the bearings 44 and 45 in horizontal
direction toward and away from side portion B. For this
purpose, the trunnion 46 is made considerably longer than
pairs of adjacent lugs extend from both the cope and drag
for receiving clamps 12 which extend around the lugs.
The lower part of the drag 6 is reinforced by a grid work
trunnion 45 so that it may derive further support from a
of webs 14 characteristic of the larger’or heavier flasks.
For use in the present invention, the flask 5 is provided 10 bearing 48 and provide a coaxial bore for receiving a
threaded jack 51. The axis and length of the jack 51 is
with flanges which extend laterally with respect to the
fixed with respect to the machine frame 52 by a pair of
collars 53 and 54 secured to an unthreaded shaft portion
end walls of the cope and the drag at both ends of the
upper periphery ofthe cope (flanges 16) and at both ends
of the lower periphery of the drag (flanges 15). These
flanges adapt the flask for entry into flask-holding guides
15
of the jack. The jackshaft extends outboardly to pro
vide an end portion for mounting crank 55. Rotation of
the jackshaft 51 traverses the trunnion 46 in either direc
of the machine hereinafter described.
tion, depending on the direction of the jackshaft, thereby
disposing cradle portion A closer or further away from
prises a main supporting frame 17 in which a flask-sup
vportion B. The two cradle portions are connected and
porting cradle 18 is rotatively supported, and in which a
reciprocable ñuid-applying mold-ejecting unit 19 is recip 20 held from relative rotation by tubular frame members 57
and 58 in telescoping relation with rod frame members
rocably supported for movements toward and away from
59 and 61, respectively.
the cradle 18.
To rotate the cradle 18 from the flask-receiving position,
The cradle 18 is shown in FIGS. 3 and 4 oriented in its
shown in FIGS. 3 and 4, to a position for ejecting the
regular position for receiving flasks containing poured
molds from a conveyor system such as the conveyor 20 25 poured mold contained by the flask in a downward direc
With reference now to FIGS. 3 and 4, the machine com
tion, the trunnion 46 is connected with a power source,
such as a motor 63 by power transmission system which,
as shown, consists of a gear reduction unit 64, the output
conveyor and frequently with portions of the poured mold
gear 65 thereof, and a driven gear 66 mounted ñxedly on
extending above the cope. The cradle 18 includes con
veyor structure which may consist, as shown of spaced 30 the trunnion 46. In a manner well-known to the electrical
control art, the machine may be provided with stops and
track members 22 and 23, each of which comprises a
limits which is to control the movements of the motor
series of rollers 24 supported on a corresponding plu
63 and the cradle 18 in a desired manner.
rality of parallel pins 25 affixed by opposite ends to a
To position flasks received by the cradle 18 in a prede
channel 26. The top surfaces of the rollers 24 lie in a
(see FIGS. l0 to l5). The loaded flasks are delivered to
the machine with the bottom of the drag resting on the
plane 'which is preferably coplanar, as shown, with the
terminad position, wherein they may be engaged accu?
supporting plane of the conveyor 20. Spaced slightly
rately bythe ejector unit 19, the upper 'guides 29 and 30
above each track member 22 and 23 are elongate guides
27, each of which isparallel to the plane of the upper sur
face of the rollers of the adjacent track member. Either
are provided with locking devices 70 and 71, respectively,
guide 27 is spaced with respect to its corresponding con
veyor trcak member to easily receive the flanges 15 of the
drag portion of the flask.
Y
ì
l
At a higher level, the cradle 18 is provided with guides
29 and 30 spaced vertically above the guides 22 and ‘23,
respectively. Each guide 29, 30 comprises a channel 28,
the length and width of which is parallel to the plane of
flask support vprovided by the track members 22 and 23.
The p_arallel flanges 74 and 75 of each guide 29, 30 are
of similar construction. Considering now device 71 of
FIG. 4, a key or pin 72 extends in slidable relation through
40
an apertured lug 73 fixed to the guide structure. The pin
in normal position extends through an aperture in the
upper flange 74, an aperture in the flange 68, and into
engagement with the lower flange 75. The pin is urged
downwardly by a spring 76 compressed between the lug
45 73 land a washer held by a key 77 extending through the
pin 72. The pin 72 has an inclined lower end surface 78
inclined upwardly toward the flask-receiving side of the
machine. Hence, the machine as viewed in FIG. 10
shows a flask entering the cradle from the right in the
spaced in the vertical direction. An intermediate flange
68 parallel to these flanges is spaced from the flange 75 50 direction of the arrow R will cam the pin 72 upwardly
to allow the flange to pass between flanges 68 and 75 of
merely to an extent necessary 1to provide facile entry there
both guides 70, 71 until apertures 80 in the flanges 16 of
between of the flanges 16 of the cope portion of the flask
the cope of the flask are directly under corresponding
5. Both guides 29, 30 are supported as shown in FIG. 4.
pins 72. The apertures 80 of both cope flanges 16 are
Referring to FIG. 4, the guide Y30 is rigidly attached
to a horizontal bar 31 in threaded relation with the jack 55 correlated with the pin devices 70 and 71 so that the aper
tures receive both pins simultaneously and act to stop
screws 32, 33 by which the guides 3_0 may be >raised or
the flask from further travel longitudinally of the cradle
lowered >in accordance with the distance between the drag
when propelled gently thereinto.I With this arrangement,
flanges .15 and the cope `flanges 16. The machine is thenl
violent movement of the flask into the cradle is to be
adapted for receiving flasks of varying height. To ac
complish adjustment of 'the 4'guides '29, '30, a worm drive, 60 avoided so that the walls of the apertures in the flanges
do not cam the 'pins upwardly ‘to allow the flask to con
such as that schematically -shown in FIG. 9a, is provided
tinue on through the cradle. An operator will, in a short
for rotating the screws 32, 33 associated with each guide
time, acquire the experience needed to transfer flasks in
29, 30. With reference to’FIGS. 4, y9, and 9a, worm-gears
35 'and 36 are mounted on the lower end of the screws
a manner to obtain the desired operation of the 'stop de
32, 33. A shaft 37 extends longitudinally through a low 65 vices 70 and 71.
For achieving the primary purpose of the invention,
er side portion ofthe cradle frame with worms 38 yand 39
i.e., to eject poured molds from flasks, the ejection unit
fixcdly mounted thereon to mesh with the ‘gears 35, 36,
19 is constructed for suddenly releasing a fluid, prefer~
respectively. A crank 41 is attached to an end of the
yably air, into the open end 'of a flask whereby the mold
shaft 37 exteriorly of the cradle frame for access to an
r70 may be discharged from the opposite open end of the
operator.
y
flask. Use is made of the impact and velocity forces
For'rotatîon of the cradle 18 within the base frame
17, the frame 'is provided with 'coaxial spaced bearings 44
developed as the -fluid is suddenly released into an en
and 45 which receive trunnions 46 and 47 of the cradle.
This iournal-bearing connection enables rotation of the
closed chamber partly formed bythe mold to be ejected,
rather than by static pressure alone. As illustrated in
cradle to invert a flask secured therein to a position 75 FIG. 8, a closure head 81, a vreservoir 82, and intercon
abrogata"
,
5
i
necting ducts 83` are combined into the single movable
unit 19. The unit 19 is tied together by 4 hollow posts
or tubes 84 (as shown) secured by their lower ends to
cradle 18 of the machine from the conveyor 20. The
ejector unit 19 is completely upwardly retracted. It will i
is in vertically slidable telescoping relation with a verti
cal rod 85, the latter 4being in fixed relation with the
be noted that the conveyor portion 23»` is in horizontal
alignment with the supply conveyor 20.
In-FIG. 11, the flask 120 is illustrated as secured within
the cradle' 18 and the cradle and the ñask undergoing ro
tation in a clockwise direction in order to be retained by
the locking pins 72 which, as described hereinbefore, are
frame 17.
not designed to ‘retain the flask and the cradle when the
the supper surface of the closure 81 and to the sides
of the reservoir 82. The posts 84 are tied together
_ in a lateral direction-by an X-'frame 86.
Each post 84
>
With the posts 84 in guide relation with the rods 85, 10 latter is rotated in a counterclockwise direction.
the unit 19 is raised and lowered through the operation of
FIG. 2 illustrates the cradle and the flask in a com
a Huid cylinder 88 ñxed to the frame 17. The lower end
pletely inverted position wherein the ñask is aligned for
of the piston rod 89 of the cylinder is secured to the
engagement along its undersurface which now faces up
unit 19 bya swivel connection'90 of which Va clevis por
wardly toward the ejector head 19.
tion pivotally connected to the end of the rod 89 is fixed 15r FIG. 13 illustrates the machine with the ejector head
to the-frame 86.
`
'
l1) bearing on the upward-facing undersurface of the
*The closure head 81 has the function of conducting
flask‘120 at the instant of air release from the reservoir
and directing a fluid released from‘the reservoir 82 into
82. The figure depicts a casting 122 and various pieces
and through a flask supported in the carriage 18»and
of the fragmented mold in the act of falling from the
properly positioned against the underside of the closure 20 ñask into a receiver 123 positioned below the cradle.
head. The closure head comprises a head plate 95 and
FIG. 14 illustrates rotation of the cradle and the empty
an adapter plate 96 supported closely adjacent the un
flask supported therein to an‘upright position in a counter
derside of the head plate 95 by angle-shaped flanges 97
clockwise direction. The ejector head 19 has been pre
and 98 ñxed to, and extending downwardly and then
viously moved to its uppermost position to allow rotation
horizontally from the opposite side edges of the head 25 of the cradle. The receiver 123 now contains the ejected
plate 95. The plates 95 and 96 have apertures 101 and
fragmented mold material and the casting 122.
102, respectively, which are in vertical registry with'the
ducts 83 for the uninterrupted transmission of air or
other fluid and blast-force >from the reservoir 82.
f FIG. l5 illustrates the withdrawal of the ñask 120 from
the machine in the same direction as it entered in FIG. 10
but to the opposite side thereof. In actual practice, one
In operation, a downwardly extending horizontally 30 flask entering the machine, as pictured in FIG. 10, may
continuous flange 104 engages the upper end surface of
a ñask along its lower edge. The adapter plate 96 is
pressed tightly against the head plate 95 to eliminate any
clearance between the two plates which might contribute
be used to propel empty ñasks from the machine as
a result of the automatic release in one direction, pro
vided by the holding pins 72,.
From the above description, it is evident thata mold
. to substantial leakage of air from a chamber formed, 35 ejecting machine according to the inventionv is capable of
when the two plates are together, yby a recess 106 in the
undersurface of the head plate andthe passageway sys
tem 107 in the upper surface of the adapter plate.
Numerous small apertures V108 lead downwardly from
removing molds and effecting the separation of castings
therefrom at speeds unknown in the use-of conventional
machinery, eg., the “shake out” machine. ‘The full po
tential of the inventionV in saving of time and labor may
the duct or canal 107 in an oblique direction intersecting 40 be realized through automatic mechanisms presently
with the vertical plane'of the nearest >portion ofthe flange
known in the field of automation and consid-ered outside
104 at a point underneath the llange. The pattern of the
the purposes of this disclosure. The invention is appli
directions of these passageways is such that their upward
cable to substantially all sizes of foundry flasks which pro-` ,
and downward projections would approximately outline
vide one open end.
a four-sided pyramid. Their purpose is vto provide' high 45 The terms and expressions which have been employed
pressure jets of air or other ñuid capable of scouring the
are used as terms of description and not of limitation ,andvr
inner wall of a flask free of any loose material. The canal
there is no intention of. excluding such equivalents of theY
107- and the recess l106 of the head plate constitute a
invention described or of theV portions thereof as fall
feed manifold connected with an air supply Ameans (which
within Vthe purview of the claims.
'
may be independent of the reservoir 82) by a duct 110 50 What is claimed is:
comprising a quick opening valve 111. The `duct 110 is
1. An apparatus for removing a poured mold from.'
connected with the head plate 95 to discharge `through
an open-end molding flask comprising: means for sup`~
an opening 112 contiguous with the recess 106.
porting the flask with both ends, exposed; closure means;
In the operation of the unit 19, the quick-opening valves
supported above the supporting means-for engaging the.
83a and valve 111 are opened simultaneously at the will
entire periphery' of one endV portion of the ñask when
of an operator by a `fluid cylinder 114 operatively con
facing upwardly to provide a substantially sealed- con»
nected with the valves Ythrough -a slotted plate 115 at
nection therewith and a cavity overlying the adjacent end
tached to piston rod 116 and valve levers 117. However,
of a mold held by the ñask; a reservoir for storing a1
in spite'of simultaneous'opening, airis discharged slightly
ñuid at elevated pressure; 4and duct means connecting the»
later from the openings 108 than into theilarge‘openings` 60 reservoir with s'aid cavity providing uninterrupted passage
102 because lof thetime required to >build up air under
for said‘ñuid from the reservoir to Vthe surface of said".
pressure in the manifold chamber and the resistance to its
mold and having capacity providing transfer of said iluidë
escape oifered by the ‘openings 108. This isa fortunate
from
the reservoir to the cavity effectingk instantaneous
circumstance since the air issuing. from thel openings 102
first -impacts the poured mold >and ejects it from the flask u equalization of pressure therebetween; said duct means
including valve means instantaneously operable from a
and. then air issues in high-velocity-jets from the open
closed condition to an open condition.
'
~
ings 108 to clean the flask walls at an instant slightly after
2. The apparatus of claim l‘wherein: said closure
the removal ofthe main body of the mold.
means comprises an upper header plate, a lower adapter
' .As shown, thev basic horizontal section of the plate 96
comprises> wood and'the flange 104 is formed 'ofa more u plate _having :a downwardly-projecting horizontally-cir
cuitous `ñange ‘adapted to continuously engage an upper
rigid material, such as metal, and is secured to the wood
face of the flask; and means for securing the plates in'
base by a plurality of angle pieces 118. j
f
i ‘ FIGS. l0 'to 15 villustrate thevarious stages of a-pneu
proximate operative positions; said plates’having `open
ings in vertical registry withsaid duct means and forming
matic mold :ejection process provided bythe invention.
In FIG. L 10 a vvtlask120 may be observed ' entering the "I5 a continuous passageway when' 'the plates are together for”
3,076,238
7
communicating a fluid to the underside of the adapter
plate.
12. The apparatus of claim 9 wherein: said supporting
means comprises roller conveyor elements having parallel
3. The Iapparatus of claim 2 wherein: the means for
axes arranged in a plane to engage an end surface of a
securing the plates together comprises projections of the
flask.
13. The apparatus of claim 11 wherein: the cradle com
header plate providing spaced opposing grooves general
ly parallel to the underside of the header plate; the pro
jections being spaced to receive a pair of opposite edges
prises spaced parallel roller conveyor members having
parallel rollers arranged tangently with a plane and dis
posed in said normal position of the cradle for receiving
of the adapter plate within said grooves.
a flask and engaging undersurfaces thereof along said
4. The apparatus of claim 1 wherein: the undersur
face of said header plate and the upper surface of the 10 plane at opposite sides of an opening through the flask.
14. In combination: the apparatus of claim 13 and a
adapter plate are recessed along opposed areas to form
conveyor system having upwardly-facing load-supporting
a fluid-conducting system separate from said duct means;
means disposed generally in a plane approximately co
and said adapter plate has passageways extending there
planar with said plane of tangency with the rollers in said
through from the tluid-conducting system and forming
openings along an undersurface of lthe adapter plate with 15 normal position of the cradle; the conveyor system being
aligned with said members in said position to provide
in the flange; said passageways being aligned for dis
uninterrupted transfer of flasks between positions on said
charging jets of fluid diagonally away from the under
members and on said conveyor system.
surface of the adapter plate and transversely underneath
l5. The apparatus of claim 13 wherein: the cradle com
5. The apparatus of claim 4 wherein: said fluid-con 20 prises horizontally-spaced flanged members mounted for
vertical adjustment along opposite sides of the cradle in
ducting system and said passageways occur along a cir
overhead spaced relation with the rollers for overlapping
cuit about said duct means, and between said duct means
and engaging an upwardly-facing surface of a flask resting
and van upward geometric projection of said flange.
on said conveyor member, said ñanged members being
6. The apparatus of claim 1 wherein: the closure has
a fluid-conducting system separate from said duct means 25 spaced from the conveyor members transversely of said
spaced por-tions of said flange.
comprising: a plurality of small passageways opening
axis of the journal-bearing connections.
16. Closure means for cooperating with the open end
of a foundry flask to form a cavity over a mold contained
flask during Ia mold-removing operation; said passageways
in the flask adapted to receive a fluid in effecting pressure
being :aligned for directing a fluid expelled therefrom in
separate directions diagonally downwardly and outward 30 ejection of the mold, said closure means comprising: an
upper -header plate; a lower adapter plate having a down
ly from said undersurface in intersecting relation with
along an undersurface of the closure which faces into a
horizontally-spaced portions of the entire periphery of
a region occupied `by a flask in normal mold-removing
position under said closure.
7. Apparatus for removing a poured mold from an
open-end molding flask comprising: means for supporting
the flask with both ends exposed; a movable unit com
prising closure means for fitting over an upwardly-facing
wardly projecting circuitous flange adapted for continuous
engagement of the end surface of a flask; said plates hav
ing openings in registry forming a continuous passageway
through the closure means when the plates are together;
said header plates having projection means extending
downwardly from its underside interlocking with edge por
tions of said adapter plate positioning said openings in
alignment for said registry.
end of the flask vin substantially sealed relation therewith
17. The closure means of claim 16 wherein: opposing
and forming a cavity thereover; a reservoir for storing a 40
areas of opposing surfaces of the plates spaced from said
fluid at elevated pressure; and duct means connecting the
openings are recessed, the adapter plate has passageways
closure means and the reservoir providing uninterrupted
extending from its rearward area to its undersurface, the
passage for said fluid from the reservoir to the surface of
header plate has an opening extending from its recessed
said mold and having capacity providing instantaneous
transfer of said fluid from the reservoir to the cavity and 45 area to its upper side; said recessed areas and said as
sociated passageways and opening defining a fluid-con
equalization of pressure therebetween and the duct >means
ducting system for scouring the walls of an empty flask.
including valve means instantaneously operable from a
18. The closure means of claim 16 wherein: said fluid
closed condition to an 'open condition.
conducting system is arranged circuitously with respect to
8. The apparatus of claim 7 comprising: means
mounted in reciprocal relation with said supporting means 50 said aligned openings'and the respective directions 'of said
passageways are aligned in intersecting relation with a
for supporting and moving said unit in a direction toward
downward geometric projection of said flange at points
and away from a position of engagement vof the closure
spaced at a common level generally uniformly along its
means with the end of a flask occupying said `supporting
means.
9. The Vapparatus lof claim 8 comprising: mounting 55
entire length.
19. A unit forv ejecting poured molds from foundry
flasks comprising: a reservoir for storing a fluid at yele
means for rotatably supporting said supporting means with
vated pressure; closure means 'comprising an upper
respect to an axis of rotation extending substantially per
header plate, ya lower `adaptor plate having a down
pendicularly to said direction of movement of the re
wardly projecting circuitous flange for effectingperipher
ciprocable means; -said supporting means being rotatable
from a normal position for receiving and discharging a 60 ally continuous engagement with the vend surface of a
flask, and means for securing the plates fin proximate
flask to an inverted position for ejecting a mold from a
operative positions; and vduct means connecting the reser
flask supported therein; said `supporting means comprising
voir with said vclosure means including aligned openings
means for holding said ña‘sk in fixed position relative to
through said plates to form a continuous passageway to
the supporting means.
10. The apparatus of claim 9 wherein said supporting 65 the underside of the adaptor .plate `when the -plates are
together; said duct means having capacity providing sub'
means includes guiding means for receiving out-turned
stantially uninterrupted passage of said fluid from the
flanges on opposite sides of a flask occupying the sup
reservoir to the Asurface of a mold facing said adaptor
porting means; said guiding means comprising _parallel
and .spaced portions for disposing said flanges therebe
plate and instantaneous equalization of pressure between
tween to confine the flask from movement in a direction 70 the reservoir and said mold surface, the duct means
transversely relative to the guiding means.
11. The apparatus of claim 9 wherein: the supporting
means `consists of a cradle connected at opposite >sides
thereof with the frame Vby two coaxial journal-bearing
connections.
75
including valve means instantaneously operable from a
closed condition to an open condition.
20. An apparatus for removing a .poured mold from
an open-end molding flask comprising: means for sup<
porting lthe ilask with both ends exposed; closure means
9
supported above the supporting means for engaging the
entire periphery of one end portion of the ñask when
facing upwardly to provide a substantially sealed con
nection therewith and a cavity overlying the adjacent
end of a mold held by the ñask; a reservoir for storing
a ñuid at elevated pressure; and duct means connecting
the reservoir with said cavity providing passage of the
ñuid from the reservoir into direct contact with said end
of the mold and having capacity providing transfer of
said fluid from the reservoir to the cavity effecting in- 10
stantaneous equalization of pressure within the reservoir
and the cavity; said -duct means including valve means
Y
10
instantaneously operable from a closed condition to an
open condition.
References Cited in the íile of this patent
UNITED STATES PATENTS
A1,011,735
1,316,884
1,613,856
1,860,022
2,799,064
2,893,079
2,962,776
Brown ______________ ___ Dec. 12, 1911
Fatscher _____________ __ Sept. 23, 1919
Stoney et al. _________ __ Jan. 11, 1927
Eggert ______________ _... May 24, 1932
Schucker ____________ _... July 16, 1957
Moran et al. __________ __ July 7, 1959
Taccone _________ ___"- Dec. 6, 1960
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