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Патент USA US3092891

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June 11, 1963
3,092,881
G. R. VOREL, SR
CLAMPING ARRANGEMENT FOR PRESSURE CASTING APPARATUS
Filed July 25. 1960
2 Sheets-Sheet 1
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INVENTOR.
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June 11, 1963
G. R. VOREL, SR
3,092,881
CLAMPING ARRANGEMENT FOR PRESSURE CASTING APPARATUS
Filed July 25. 1960
2 Sheets-Sheet 2
1.39
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INVENTOR.
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Patented June 11, 1963
pin
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3,692,S81
the chamber 14. In order to ensure the proper position
ing of the ladle within the tank, the side wall 22 may be
CLAMPWG ARRANGEh/ENT FOR PRESSURE
CASTHQG APPARATUS
George R. Vorel, Sn, Downers Grove, Ill, assignor to
Amsted industries Incorporated, Chicago, 111., a corpo
ration of New Jersey
Filed July 25, 1960, Ser. No. 45,106
2 Claims. (Cl. 22-69)
provided with a plurality of inwardly extending integral
ladle guides 26, each of which includes an inwardly and
downwardly sloping wall 28 and a vertical radically ex
tending support web 2.9 connecting the inclined wall to
the tank side wall.
The cover 12, as best seen in FIGURE 1, comprises a
preferably circular metallic plate 36 having a central aper
This invention relates to a clamping arrangement, and 10 ture 32 extending vertically therethrough for receipt of a
more particularly to a clamping arrangement for use with
apparatus employed in the pressure casting of molten
metal.
The invention comprehends an improved arrangement
pouring tube T which affords a means of transferring the
molten metal M from the ladle to a mold D supported on
the upper end of the tube above the cover 12. The under
side of the cover plate 39' may also be provided with an
for detachably clamping a cover on a pressure casting 15 insulating layer 34.
tank.
1In order to ensure the success of a pressure casting
Additionally, the cover and tank
may be provided with a pair of mating guide pins and
holes (not shown) to help maintain proper alignment
operation of the type wherein molten metal, in a pres
between cover and tank.
sure tank having a cover, is forced, by the application of
The cover may also be provided at its outer periphery
super-atmospheric pressure thereagainst, from the con 20 with an annular outwardly and downwardly sloping shelf
tainer through a tube extending through the cover, into
or lip 44? secured to the cover in any manner such as by
a mold disposed without the tank, it is essential that there
welds 42 and reinforced by a plurality of vertical radial
be an air-tight connection or seal between the tank and
webs 4-4.
the cover. This is necessary because of the pressures
The underside of the cover plate 30 may be provided
which are necessary to pressure pour the metal.
25 with a plurality, preferably 8 pairs of integral clamp arm
Not only must the connection between the tank and
lugs 46 which are spaced circumferentially from each
cover be air-tight, but it must be a strong connection able
other around the outer periphery of the cover and which
to withstand the intense pressures to which it is subjected.
project downwardly therefrom on the outer side of the
Additionally, the connection, or clamping arrangement,
tank wall 22.
‘ _
1 ‘
between the tank and cover must be one which can be 30
lPivotally connected to each of the clamp ar-m lugs 46
rapidly coupled or uncoupled so that the change or re
by a pin 453 is a generally vertically disposed clamp arm
placement of covers can be accomplished in a minimum
50, which carries adjacent its lower end a pair of rollers
amount of time to conserve the heat in the mass of molten
52 pivotally connected to the arm by pin 54. The lower
metal to be cast.
extremity of the arm is provided with an integral out
Accordingly, it is a primary object of this invention to 35 wardly projecting foot 5% which has a table or shelf '58 ex
provide, for a pressure casting tank and cover, a clamping
tending transversely of the arm and presenting a generally
arrangement that is strong enough to withstand severe
horizontal upwardly facing surface 59. The function of
pressures and which can still be rapidly connected or
the clamp arm will be described later in the speci?cation.
disconnected.
In order to prevent the heat in the tank from causing
These and other objects of the invention will be appar 40 a deterioration or distortion of the rubber seal 16, the
ent from an examination of the following description and
upper rim of the tank may be provided with an annular
drawings, wherein:
integral water jacket 64) which comprises horizontal upper
FIGURE 1 is a fragmentary vertical sectional view of a
and lower plates 62 and 64, respectively, which project
pressure tank arrangement embodying features of the
outwardly from the tank side wall 22 and which are inter
invention;
FIGURE 2 is a top plan view of a portion of the struc
ture illustrated in FIGURE 1;
FIGURE 3 is a plan View of a portion of the structure
taken on line 3—3 of FIGURE 1, and
45 connected at their outer extremities by an annular ver
tical outer plate 66 which, together with the tank side wall
and the top and bottom plates, de?nes an annular cavity
68 through which may be continuously circulated a supply
FIGURE 4 is a vertical sectional view taken on line
4--4 of FIGURE 1.
Referring now to the drawings for a better understand
of cold water. The connections of the water source to
the water jacket 60 are not shown as they do not com
prise an essential part of this invention and the connec
tions may be made in any convenient manner. The upper
ing of the invention and particularly to FIGURE 1, it will
surface of the jacket top plate 62 may be provided with
be seen that a clamping arrangement embodying features
of the invention is shown as applied to a pressure tank
assembly which includes a preferably cylindrical pressure
tank, indicated generally at 10, and a cover for the tank,
indicated generally at 12.
The tank has an internal pressure chamber 14 adapted
to receive a ladle L of molten metal M. In order to eifect
a ?uid tight seal between the cover and the tank, there
may be provided an annular, preferably rubber, seal 16
between the rim of the tank and the cover. 'The actual
connection between the cover and the tank is accom
plished by a plurality of clamping devices 18 spaced from
each other circumferentially of the tank and cover.
Referring now to FIGURES l and 2, it will be seen
that the tank is preferably cylindrical in shape and in
cludes a base plate 20 and an annular side wall 22 up
an annular groove 69 for receiving a portion of the rub
ber seal 16, to prevent the lateral displacement of the
seal.
The wall 22 of the tank may be provided on its outer
side with an annular shelf 8%‘ which includes, at spaced
intervals, a plurality of roller guides 82, each of which
includes a downwardly and outwardly sloping wall 84 and
an integral wall 85 which extends vertically downwardly
from the outer extremity of wall 34. The shelf may be
supported by a plurality of vertical webs 88 disposed
under the wall at each of the roller guides 82.
That portion of each clamping mechanism 18 which is
carried by the tank includes a support and/or inclosure
structure indicated generally at 90. The structure 99 in
cludes a base plate or ‘1001"
which has one side rigidly
secured in
manner as by weld 94 to the side wall 22
standing therefrom. The inner sides of the base plate and
of the
a point located just below the roller guide
side wall may be provided with a refractory liner 24 which 70 web 88 of the related clampirny mechanism. The plate
serves as an insulating barrier to retain the heat within
92 is disposed at a small angle relative to the horizontal
3,092,881
3
so that the plate slopes downwardly and outwardly from
its point of contact with the side wall of the tank. Up
st-anding from opposite sides of the plate 92 are a pair of
generally vertically extending side walls 96 which are
interconnected at their outer extremity by a transversely
extending generally vertical rear wall 98 which is also
upstanding from the base plate 92.
A.
having a plurality of separate lines 1M2 leading to each of
the jack mechanisms. Each line 1142 is disposed to extend
through the opening 119 in the rear wall 98 of the sup
port structure 9% and has a connection at 144 with the
housing of the jack mechanism.
In operation it will be understood that after the cover
Thus it will be seen
has been placed on the tank by any means such as by a
that walls 96 together with wall 98, ?oor 92, and tank
side wall 22, form an inclosure for the related clamping
foundry crane (not shown) all that is necessary to lock
196 and 102, respectively, which project inwardly from
to thereby clamp the cover on the pressure tank. When
it is desired to remove the cover, the jack mechanisms
are de-energized and the cover may be lifted off in the
the cover in position is to energize the jack mechanisms
of the respective clamping devices so that their rams will
device as best seen in FIGURE 1.
Side walls 95 of the structure are preferably intercon 10 move downwardly and engage the surfaces 59 of their
nected by a pair of spaced parallel upper and lower shelves
related clamp arms 50 and exert a downward pressure
the rear wall \98 toward the tank side wall 22. These
upper and lower shelves may be reinforced by separate
pairs of spaced vertically extending pairs of webs 104 15 same manner in which it vwas applied.
and 106, respectively, which are formed integrally with
I claim:
rear wall 98v and their respective shelves. It will be seen
that the shelves 100 and i102 together with the rear wall
98 de?ne a pocket 1108, open toward the tank, which is
adapted to receive and retain a jack mechanism, the de
tails of which are described later in the speci?cation.
In order to afford additional support, the structure
1. In a pressure casting arrangement, the combination
.
of: a pressure tank open at the top, a detachable cover
for closing the open top of said tank, a plurality of down
wardly depending clamping arms secured to said cover
and spaced generally circurnferentially thereabout, each
of said clamping arms comprising an elongated body por
9% vmay include a reinforcing web portion 11%‘ generally
tion, a generally upwardly directed abutment surface
T-shaped in section comprising a pair of generally ver
formed on said body portion near the lower end thereof,
25
tically extending walls or webs 112 and 114 upstanding
roller means pivotally secured to said body portion near
from the ?oor 92 behind the rear wall 98 with the web
said lower end, a plurality of downwardly directed mount
112 extending parallel to rear wall 98 and the web 1114
ing brackets continuously secured to said cover, a pivot
interconnecting the rear wall 98 and the web 112.
The upper and lower shelves 103 and 1&2 may be
member pivotally securing each of said clamping arms
near their respective upper ends to said mounting brackets,
provided ‘with openings 1'16 and 118, respectively, extend 30 a plurality of laterally extending support assemblies se
ing vertically therethrough and the rear wall 98 may be
provided at its upper extremity with an opening 1119 ex
cured to said tank in a manner radiating generally out
ward-1y therefrom, a pressure responsive piston and cyl
inder assembly received and retained by each of said
tending therethrough. The purpose of these openings
will be described hereinafter together with the jack mecha
support assemblies, a source of pressure ?uid connected
nism 120 which is received within the pocket 108 formed 35 to each of said pressure responsive piston and cylinder
by the shelves and rear wall of the support structure 99.
assemblies, said pressure responsive assemblies being re
As best seen in FIGURE 1, the jack mechanism includes
a housing or cylinder 120 having extending therefrom a
?uid actuated piston or ram 124. The housing may be
ceived by said support assemblies in a manner enabling
downward movement of said piston in a direction slightly
inclined from the vertical and toward said tank whenever
40
secured to the structure 90 by means of a bolt 126 dis
actuated by said source of pressure ?uid, and a plurality
posed to extend through the hole 116 in the upper shelf
of guide structures formed on said tank externally there
1&0 and be threadably received within the housing 129.
of and arranged so as to be generally in juxtaposition with
The lower portion of the housing v1.2% is disposed to extend
said
support assemblies, each of said guide structures
through or reside in the opening or slot 118 in the lower
comprising an inclined guide surface extending both
shelf and may be retained in position by means of a pair
downwardly and away from said tank, a vertically ex
of retainer plates 12% which are secured to the lower
tending
and downwardly directed abutment surface formed
shelf 162 by means of a plurality of nut and bolt assem
at the lowermost end of said guide surface, said guide
blies 129.
surfaces and roller means being effective to continuously
In order to more completely inclose the jack mecha
nism 120 within the pocket 118 and thereby protect it 50 position said lower ends of said clamping arms as said
cover is being lowered onto the tank in order to place said
from molten metal ‘which might splash over onto it at
upwardly directed abutment surface in the normal path
any time during the casting operation, there may be pro
of travel of said piston, and said vertically extending abut
vided over each support structure 9%, a roof assembly 130
ment surfaces and said roller means being effective to
which comprises an arcuately shaped generally ?at out
wardly and downwardly sloping horizontal wall 132 55 limit lateral movement of said lower ends of said clamp
having extending downwardly and slightly inwardly from
ing ‘arms when said piston is urged against said up
shown) to the jack mechanisms of the respective clamping
therefrom, a pressure responsive piston and cylinder as- .
devices by a main pressure fluid line or manifold ldtl
sembly received and retained by each of said support
wardly directed abutment surface upon actuation by said
its inner periphery a generally vertical wall 134'. The
source of ?uid pressure.
wall 132 may be provided with a pair of depending
2. In a pressure casting arrangement, the combination
vertical ?anges 136 which are spaced from each other a
distance slightly greater than the distance between the 60 of: a pressure tank open at the top, a detachable cover
for closing the open top of said tank, a plurality of down
side walls 96 of the support structure 9d so that when the
wardly depending clam-ping arms secured to said cover
cover assembly is placed over the jack mechanism, the
and spaced generally circumferentially thereabout, each
flanges 136 will be disposed adjacent the outer sides of
of said clamping arm-s comprising an elongated body por
the respective side walls 96. Also, the vertical wall 134
tion, a generally upwardly directed abutment surface
is considerably more narrow than the horizontal wall 132
formed on said body portion near the lower end thereof,
and is adapted to ?t between a pair of spaced bars 138
roller means pivotally secured to said body portion near
which are secured to the upper and lower shelves of the
said lower end, a plurality of downwardly directed mount
support frame. Thus the horizontal wall of the cover as
ing brackets secured to said cover, a pivot member piv
sembly protects the exposed upper portion of the clamp
otally securing each of said clamping arms near their
mechanism and support structure and the vertical wall
134 serves as a cover for the front portion of the pocket
respective upper ends to said mounting brackets, a plu
108 which receives the jack mechanism.
rality of laterally extending support assemblies secured
Pressure fluid may be delivered from a source (not
to said tank in a manner radiating generally outwardly
3,092,881
5
6
assemblies, a source of pressure ?uid connected to each
onto the tank in order to place said upwardly directed
abutment surface in the normal path of travel of said
of said pressure responsive piston and cylinder assemblies,
said pressure responsive assemblies being received by
said support assemblies in a manner enabling downward
movement of said piston whenever actuated by said source
of pressure ?uid, and a plurality of guide structures formed
on said tank externally thereof and arranged so as to be
piston, and said vertically extending abutment portion and
said roller means being effective to limit lateral movement
of said lower ends of said clamping arms when said pis
ton is urged against said upwardly directed abutment
surface upon actuation by said source of ?uid pressure.
generally in juxtaposition with said support assemblies,
each of said guide structures comprising an inclined
guide surface extending ‘both downwardly and away from 10
said tank, a vertically extending and downwardly directed
References Cited in the ?le of this patent
UNITED STATES PATENTS
abutment portion formed on said guide surface near the
632,251
Cooper _______________ __ Sept 5, 1899
lowermost end thereof, said guide surfaces and roller
means being effective to continuously position said lower
2,006,240
2,734,824
ends of said clamping arms as said cover is being lowered 15
2,912,728
Hines _______________ __ June 25, 1935
De Luca ____________ __ Feb. 14, 1956
Sylvester ____________ __ Nov. 17, v1959
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