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Патент USA US2412425

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Dec. 10, 1946. '
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H. H. RAWSON
2,412,425
FOUNDRY SAND SIFTING AND FLASK-FILLING APPARATUS
Filed Sept. 6, .1944
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Bnuentor
- Harry/V. Wan/30?
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Dec.10,1946.'
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?_.H,HY,RAWSON
2,412,425
FVOUNDRY ?SAND SIFTING ?AND FLASK-FILLING APPARATUS
Filed Sept. 6, 1944
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3nnentor
Harry H Ra WSO/Z
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Patented Dec. 10, 1946
2,412,425
UNITED STATES PATENT OF FICE,?
2,412,425
FOUNDRY SAND SIFTING AND FLASK
FILLING APPARATUS
.
Harry E. Rawson, Spokane, Wash.
Application September 6, 1944, Serial No. 552,906
1 Claim. ' (Cl. 209?240)
1
This invention relates to a ?ask-?lling appa
ratus and it is one object- of the invention to
provide an apparatus by means of which ?asks
used by moulders in a foundry may be quickly
and very easily ?lled with sand which has been
sifted in?order to remove foreign matter.
'
Another object of the invention is to provide
a ?ask-?lling apparatus wherein a hopper for
holding sand may be supported above a frame
2
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nut ID for resting upon the sleeve and supporting
the plate in a vertically adjusted position. The
portion of the machine so far described is con
5 ,
ventional and, at the present time, it has been
customary to ?ll the ?asks with sand scooped
from a pile on the floor with a shovel.
This has
been found unsatisfactory as dirt and other for
eign matter is liable to become mixed with the
sand and deposited inthe ?asks as sand is shov
mounted for reciprocating movement over a bag 10 .eled into them.
and carrying a screen or riddle through which
In the improved apparatus, the sand as received
the sand passes so that only clean sand will drop
at a foundry is placed in a hopper II in any de
into the bag.
7
sired manner, where it is stored before being used.
Another object of the invention is to provide
This hopper is carried at the upper end of a stand
the frame with a riddle support so mounted that 15 ard I2 by an arm is and from the hopper extends
it may be released and swung downwardly to
a bracket M braced by an arm I5 bearing against inoperative position allowing removal of the rid
the standard. The bracket [4 carries a cylinder
dle for cleaning and replacement after cleaning.
It in which a piston I1 is reciprocated by air
Another object of the invention is to provide
delivered from a source of supply by a pipe line
the apparatus with a bag for receiving clean sand, 20 It controlled by a valve l9, the cylinder l6 and
the bag being tapered toward its lower end which
its piston ll being of conventional air-actuated
is open and surrounded by a ring having handles
design. At its outer front end the piston I1 is
by means of which the lower portion of the bag
?Xecl toa frame 2% formed 01'? strong ?metal and
may be turned upwardly and thus closed to re~
preferably circular in shape.v This frame or ring
tain sand in the bag.
20 is provided at opposite sides with trunnions 2|
Another object of the invention is to provide
which engage through eyes at lower ends of links
improved means for holding the lower portion of
22 suspended from trunnions 23 at opposite sides
the bag in folded position after a ?ask has been
of the hopper H and when the piston I?! is re
?lled with sand.
ciprooated in the cylinder [6, reciprocation will?
Another object of the invention is to provide
be imparted to the frame or ring 20.
an apparatus of this character which is simple in
Within the frame or ring is disposed a screen
construction and very easy to operate.
or riddle 24 of appreciably smaller diameter than
In the accompanying drawings:
the ring so that it ?ts loosely therein and may
Fig. 1 is a side elevation of the ?ask-?lling
be very easily inserted or removed. The riddle
apparatus with portions in vertical section.
rests upon a frame or support 25 formed of metal
Fig. 2 is a view on the line 2--2 of Fig. 1.
rod and of oblong shape. This support or frame
Fig. 3 is a sectional view on an enlarged scale
taken through the riddle and its support, on the
line 3-3 of Fig. 2.
Fig. 4 is a fragmentary View showing the lower
portion of the hopper and the riddle-carrying
. extends diametrically of the ring 20 and has its
rear cross bar mounted through a bearing bracket
26 at the back of the ring and the cross bar has
?its front end formed with a forwardly projecting
slotted tongue 27 to receive a threaded stem 28
support suspended therefrom. ?
pivotally carried by a bracket 29 so that it may
This improved ?ask-?lling apparatus has a
be swung vertically into engagement with the
base I carrying a vertically adjustable support or
tongue and the wing nut 30 then tightened to!
lift 2 upon which the ?ask 3 to be ?lled with
secure the frame 25 in its raised or operative
sand is placed. This lift has a conventional
position where it will support the riddle in the
pneumatic lift construction and is actuated by
ring 2!). When the ring is reciprocated by action
the usual lever 4 so disposed that it may be
of the piston the riddle will be shaken and stones
operated by pressure applied to it by an oper
and trash held in the riddle while lumps of sand
ator standing in front of the apparatus. A sec 50 will be broken up and all of the sand in the riddle
ond pneumatic lift 5 is located back of the lift 2
will pass through it. By loosening the nut and
and its cylinder 6 carries a plate ?I which is swung
swinging the bolt 28 upwardly out of the tongue,
over the ?ask after the ?ask has been ?lled with
the frame may be lowered and the riddle removed, ,
sand. The plate is carried by a threaded stem
cleaned, and replaced, and the sup-port or frame
8 which passes through a sleeve 9 and carries a 55 25 again secured in its raised position.
2,412,425
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Under the ring 28 is a circular frame 3| formed
of inner and outer rings 32 and 33 between which
? is secured the upper end of a bag 34 formed of ?
fabric and tapered toward its lower end, which
. is open so that sand may flow out of the bag .
and into the ?ask over which the lower end of
the bag terminates in spaced relation thereto.
.
.
hook catches upon the ring and the bag will be
held folded and no sand? can ?ow from its lower
end. By adjusting the hook along the rod the .
extent to which the bag is folded may be con
trolled. When the ?ask is to be ?lled, it is merely
necessary to shift the rod upwardly, turn it
slightly to detach the hook from the ring 3| and r
then allow the rod to slide downwardly to its full
The outer ring carries a hinge bracket 35 having
extent. The bag will thus; assume the position
at its outer rear end a head 36 formed with a
toothed inner side face for inter?tting engage 10 shown in Fig. 1 and sand may flow from it into
the ?ask. When the riddle becomes clogged with
ment with the similarly toothed side face of the
head 31 of a bracket 38 which is ?xed to the inner ?
face of the standard l2 below the cylinder IS.
foreign matter screened from sand delivered to "
it from the hopper ll, the wheel nut 41! is loos
ened and the ring 3| and the upper portion low
A threaded stem 39 extends from the head 36
through head 31 and carries a Wheeled nut 49 15 ered until the ring 3| hangs vertically from the. bracket 38. The frame 25 is then released and
which, when tightened, draws the head 36 into _;
lowered, together with the riddle ?or screen 24
engagement with the head 31 and ?rmly holds l
and the riddle removed from the frame and
the bracket 35 against tilting movement. There
cleaned. The riddle is thenreplaced upon the
fore, the ring or frame 3| will beheld in hori- ?
zontal position and close to the frame 25 so that 20 frame 25 which is returned to the raised position,
as the ring 25 is reciprocated by the piston |'|,
clean sand shaken through the riddle will drop
into the bag.
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(where it is secured by the bolt 28; the? ring or
?frame 3| being then swung upwardly to raised
position and the nut 40 tightened to hold it in?
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When the bag is in the position shown in Fig. 1,
sand may flow therefrom? into the ?ask and fill 25
this
ther?ask. After the ?ask has. been ?lled, flow?
claimed
of sand from the bag must be stopped. To ac
complish this, the lower end portion of the sack ?
or bag is folded upwardly. About its open lower
endthe bag carriesa collar 4| from which extend
radiating rods 42.
One of these rods has a sleeve
43 at, its. outer end in which is ?xed the lower
endof a rod 44. The rod 44 extends vertically
with its upper portion slidably engaged through a
sleeve 45 carried by the hopper H at the front
thereof, and a nut 46 upon the rod limits its;
downward movement through the sleeve. A hook
41 is mounted upon the rod 44 for adjustment
longitudinally thereon andtwhen the operator
grasps. one or. two of? the rods or handles. 42 of.
the ring and exerts upward thrust, the ring and
the vrod will be shifted upwardly and the lower;
portion of the bag turned upwardly with the ring.
After the rod has been shifted upwardly a su?i
cient distance for the hook to overhang the frame
3| and then allowed to move downwardly, the?
position.
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Having thus, described the ' invention,? what is
is:
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A ?ask-?lling apparatus comprising a base, a ?
standard rising from said base, a hopper "sup?
ported from said standard and spaced upwardly? -
from the base, a riddle mounted for reciprocating
movement under said hopper, a fabric bag under
said riddle tapered toward its lower end and
having rings at its upper and lower ends, rods
projecting frornthe lower ring, a rod 'shiftable
vertically in front ?of the hopper and, the bag,?
one rod of the lower ring being connected with;
the lower end of said'rrod, and a hook carriedby
the vertical rod and shiftable thereon to verti
cally adjusted positions, said hook being shifted
vertically with the rod into positionforf engaging
the upper ring and ?holding-a predetermined por-_
tion of the lowerend portion of said bag in vup
wardly folded position to?close the lower 'end' of
the bag and retain sand in the bag.
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